Gm Catalyst Monitor Drive Cycle

Inorder to pass inspection your car needs to complete a full drive cycle so that all (8) internal monitors have a status of "Ready". The procedures detailed below apply to many but not all 1996-newer Jaguar models. Toyota has various OBD2 readiness monitors for emissions testing, and by conducting a Toyota Drive cycle, you can activate and ready the Toyota ODBII sensors. In the old days of OBDI, you could reset the computer and run your vehicle over to the emissions testing station. There is no equivalent of Onstar over here yet and my efforts to get GM to offer something have been fruitless. Decelerate. On Chryslers, we always start the drive cycle with a morning cold start. You need to run the "GM Drive Cycle" to get them to reset. During this time, in addition to the diagnostics performed in step 4, the catalyst monitor diagnostics will be performed. With that being said, the oxygen sensor constantly monitors the hot gasses that pass through the exhaust manifold. I have noticed the same trend of gasoline/petrol cars. The PCM will command the check engine light to illuminate and store a DTC if the fault occurs during 2 drive cycles. Using Emissions Drive Cycles to Verify Repairs verify a catalyst repair in just over 80 seconds. See OBD Clearinghouse or Suzuki service information. Take caution when performing drive cycles on public roadways. I had new front and rear catalyst put on/gaskets/O2 sensors both bank 1 and 2. Inspection Monitor requires 8 Drive Cycles to be ready, Thanks for info. Drive Cycle What is a drive cycle? Simply put, a drive cycle is a set of testing conditions for a certain portion of a car's emission system. Texas allows you to have one monitor incomplete, and I have chosen the evap monitor since the check engine light could pop back on. The next drive cycle doesn't begin until the engine has been shut off, allowed to cool back down and is restarted again. Anyhow, that 50 mile "drive cycle" may have too much freeway time and not enough idle time and lower speed (surface street) cruising time. A monitor should not be confused with sensor, nor does each sensor have its own monitor. at least two drive cycle failures to set. Exactly what does it take to complete the catalyst monitor. CATALYST MONITOR DRIVE CYCLE INSTRUCTIONS Check Monitor Status At the end of the drive cycle, review the status of the Catalyst Monitor on Scan Tool Stop Pre-Test Conditions Clear Cod£ ECT PID at least 126+ Engine runnirg Catalyst temp from to Start Driving Instructions Accelerate to 25-45 mph and maintain that steady speed for 5-10. DECELERATION part 2. The PCM will command the check engine light to illuminate and store a DTC if the fault occurs during 2 drive cycles. View Jaideep Singh’s profile on LinkedIn, the world's largest professional community. How to Do BMW OBDII Drive Cycle for Smog Check: Why do I need to do a drive cycle? If you have recently changed the battery on your BMW or done a major repair for the engine or emission system, the on board computer has mostly been reset. Login to reply. Noticeable amount of Co is lost from the catalyst even at beginning-of-life, further loss after AST. June 9th 2010. Allow vehicle to warm up 10-15 mins. Symptoms of a P0420. All you have to do is drive the car for a few days and every system will test. Texas passed it with the Evap still unset. Have the fuel tank between 30 and 70 percent full. Department of Energy (DOE) Vehicle Technologies Office (VTO) and Fuel Cell Technologies Office (FCTO), which support U. This will perform the same diagnostics as in step 5. _____ General Motors Driving Cycle A complete driving cycle should perform diagnostics on all systems. If the catalyst is marginal or the battery has been disconnected, it may take 5 complete driving cycles to determine the state of the catalyst. Make sure to obey all traffic laws while performing the drive cycle. Different monitors have different drive cycles and some actually can complete at the same time with similar drive cycles. # of 4x Ref Pulses between CAM Counter # OF EGR ADAPTIVE LEARN MATRIX CELLS OUT OF RANGE High. To perform an OBDII Driving cycle for GM vehicles do the following: Cold Start. GM auto repair and tune up inc. The OBD-II drive cycle begins with a cold start (coolant temperature below 122 degrees F and the coolant and air temperature sensors within 11 degrees of one another). It's not really a monitor, but a switch to say that all of the main test are not done yet. Here's what the website, Smog-Tips says ===== The specific drive cycle for your Chrysler is complex. PTO not engaged. As an example, if an emissions test is to be performed on a Ford, and the Catalysts Monitor in that Ford needs to be set, the drive cycle that must be performed would be specifically for a Ford Catalyst Monitor. A short term temperature gradient event refers to an event with a temperature gradient that is greater than the threshold and exists for less than a predetermined period. Duramax Problems Common Problems with the 6. Drive cycle simulations of advanced vehicle/emissions control systems 2017 CLEERS Workshop Agenda. However, to satisy all of the different Trip enable criteria and run all of the OBD II diagnostic monitors, the vehicle must be driven under a variety of conditions. cycle naturally aspirated engines. In these instances, when the all monitor status is NO, the vehicle must be driven on a complete drive cycle that runs all monitor tests. ISSUE: Some 2013-2015 F-Super Duty vehicles equipped with a 6. 39 percent of the market for PHEVs, and 0. These DeSoots do not need to be completed in one drive cycle. The following drive cycle was found via an internet search:. What Do You Mean My Car's Not Ready? or consult with a qualified auto technician who can tell you how to complete a vehicle or monitor specific drive cycle. Login to reply. coast vehicle down to 20 mph (vehicle in drive or w/ clutch engaged, brake off) 4. OBD II Drive Cycle -- A specific mode of vehicle operation that provides conditions required to set all the readiness monitors applicable to the. I have another thread on the same issue. Different monitors have different drive cycles and some actually can complete at the same time with similar drive cycles. vehicles, these fault codes may be read by switching the ignition switch to position II and observing the fuel injection fault display unit, which is located underneath the right hand front seat, adjacent to the ECM. A cold engine startup (e. Exactly what does it take to complete the catalyst monitor. The PCM runs the monitor test automatically under the right conditions. By following the below GM "Drive Cycle" I cleared the 02 sensor but ironically enough as it explains what to do and states which sensors will be turned on by doing so, there is nothing on the Drive Cycle that says anything about "turning on" the Evap System. I have another thread on the same issue. If the catalyst is marginal or the battery has been disconnected, it may take 5 complete driving cycles to determine the state of the catalyst. The following are some sample drive cycles for the catalyst monitor to run. It can take several cold soak drive cycles AND a tank of gas to set at times just due to all the complicated parameters that have to be set in order for the monitor to transition from NOT READY to READY. Some monitors, for instance, the EVAP monitor, may require the fuel level to be between 35% and 85% to initiate the diagnostic testing. catalyst monitor from running. I don't even look at that. They should do this as a courtesy and for free. (2002 MY vehicles will run monitor at temperatures below 14E F by cycling key to OFF and repeating drive. A reminder light is triggered by a mileage event (20-40,000 miles usually) or something like 2000 key start cycles. However, to satisy all of the different Trip enable criteria and run all of the OBD II diagnostic monitors, the vehicle must be driven under a variety of conditions. com, the place dedicated to that DTC (diagnostic trouble code) P0420. The drive cycle begins with the engine cold (coolant temperature below 122/F and the coolant and air temperature sensors within 11/ of one another). I have a regular scan gauge and I have drove over 400 miles. I had to restart the DRIVE CYCLE 5 times before I was done, and even so, I couldn't get the EVAP not ready to go away. Supports 264 vehicle parameters. The Monitor. " I have read about the drive cycles to reset this, but find them completely impossible to achieve in the real world (start from cold, idle for ten minutes, drive at a constant 50mph for a half hour, idle for thee minutes, drive at a constant 30mph for ten minutes, etc. Perform acceleration steps only on highways). HOW TO PERFORM A GENERAL MOTORS CHEVY S-10 DRIVE CYCLE The following is a General Motors Drive Cycle Pattern which should allow your vehicle to complete all its emission monitors. The evap is ready, but the 02 and catalyst is not ready. So I replaced my egr valve as suggested by a mechanic on here and I reset the code and It has been 150 miles and no code and running better! But my problem now is that my egr and evap im monitor says incomplete (i need 1 of them to clear, the other 6 are ok) and I have tried the drive cycle driving suggestions and still incomplete. It resides in the area of the software of the ECM known as CARB (California Air Review Board) Readiness monitors. I drove around for a week and got the monitors checked. Does it run the catalyst monitor? On my 01 F-bird, LT's and hiflow cats, rear O2S present, stock settings on all DTC's, all the monitors trigger after several drive cycles. 5) Even after 10 drive cycles of various driving conditions the Catalyst monitor remained 'Not Ready' 6) Remaining monitors were set to ready. Conditions can include things like driving for 2 mins at 55mph steady, then slow down to 25mph for 30 secs while in second gear etc etc. Generally the drive cycle has specific tests that have to be performed for a specific time period and speeds. 9 Drive Cycle Monitor continuously updates as the vehicle. In the earlier days of Cat’s, car companies use to run very rich to heat up the cat quickly. Insert the key into the ignition Turn the ignition On-Off-On-Off-On within 5 seconds Record the 2-digit DTC as displayed by the flashing MIL I. OBDII readiness drive cycle procedures C = Catalyst Monitor will add fuel vapor to the engine and monitor the ability of fuel control sensors to read and. 8L General Motors vehicles - Vehicles report the continuous monitors as "unsupported", rather than ready. Search Google for "OBD 2 Drive Cycle" and you will find instructions of exactly what to do to get all of the tests to run. Note: Due to the limited preconditions provided with this drive trace, NCVECS recommends using the monitor specific drive traces for Chrysler vehicles. All Onboard Diagnostic Monitors are cleared when the battery is disconnected or when the Powertrain Control Module (PCM) is cleared with the Scan Tool. As an example, if an emissions test is to be performed on a Ford, and the Catalysts Monitor in that Ford needs to be set, the drive cycle that must be performed would be specifically for a Ford Catalyst Monitor. Decelerate. If the catalyst is marginal or the battery has been disconnected, it may take 5 complete driving cycles to determine the state of the catalyst. There is no equivalent of Onstar over here yet and my efforts to get GM to offer something have been fruitless. (2002 MY vehicles will run monitor at temperatures below 14E F by cycling key to OFF and repeating drive. An urban driving cycle was also run on the test bench with a diesel exhaust system that included a particulate filter working in regeneration mode. ' If the output of the monitor is not ready, what does that indicates? It signifies that the requisite Drive Cycle has not run completely; thus, the catalyst monitor has not tested the catalytic converter. OBD drive cycle. Hold a steady speed of 88km/hr (55mph) for five minutes. Hold Steady Speed. IAT (Intake Air Temperature) must be 14E F (-10E C) or more. I have a regular scan gauge and I have drove over 400 miles. Test as normal. NMHC System Monitor [**NMHC Catalyst Monitor**]; The following conditions must be met: Coolant temperature must be over 140°F (60°C). The GM EVAP monitor procedure is a known trouble spot for all GM vehicles (regardless of any tunes or the AFM Disabler being installed). 5) Even after 10 drive cycles of various driving conditions the Catalyst monitor remained 'Not Ready' 6) Remaining monitors were set to ready. EVap not ready. Let's assume your (my) car is running fine now. Among the drive cycles, the FTP+US06 provided the best approximation of the RDE results. Vehicle manufacturers set these procedures. How to Perform a Basic Drive Cycle. A three way catalyst converter (Manifold) with high oxygen storage capacity will indicate a low switching frequency of heated oxygen sensor 2. However, I have driven the truck for about 2 weeks and the Catalyst monitor still says incomplete. During this portion of the Drive cycle, the Catalyst Monitor diagnostic runs. Get the engine up full to operating temperature and shut the engine off. Inspection was due in July. Does it run the catalyst monitor? On my 01 F-bird, LT's and hiflow cats, rear O2S present, stock settings on all DTC's, all the monitors trigger after several drive cycles. php on line 143 Deprecated: Function. I have even tried driving the drive cycle several times. Decelerate. Each step of the drive cycle indicates a test for a different monitor on the vehicle (catalyst, o2 sensor, evap, etc) so each step is important. View Jaideep Singh’s profile on LinkedIn, the world's largest professional community. a drive cycle and my EVAP system monitor is. Drive your vehicle to your regular shop and have them re-check your readiness monitors, present codes, and pending codes. NOTE: If the vehicle initially failed for a catalyst related DTC, the catalyst monitor must be READY to complete a retest. They should do this as a courtesy and for free. The following are some sample drive cycles for the catalyst monitor to run: Ford: The catalyst monitor will not run until the HEGO (oxygen sensor) monitor has run and completed successfully with no faults found. Drive Cycle Monitor The Drive Cycle Monitor function is very similar to the I/M Monitors though the Drive Cycle Monitor is used to view REAL TIME operations of the Emissions System on OBD II vehicles. Ford, GM, Toyota, and Honda, I'm pretty much able to run all the monitors except the EVAP within 400 seconds of the LA4 drive cycle on my SnapOn/Sun machine unless there are underlying problems. • System monitors —The ECM operates a component (or multiple components) to verify system operation. Software development for Diesel particulate filters (DPF) - Rapid soot regeneration, configuration of twin flow systems, different soot regeneration strategies, exhaust component monitoring, white smoke reduction (SOx regeneration) in the Diesel engine vehicles. However, to satisy all of the different Trip enable criteria and run all of the OBD II diagnostic monitors, the vehicle must be driven under a variety of conditions. Some of these generic drive cycles are identical to the drive cycle included for GM vehicles (Chevy, Buick, Cadillac, GMC, Pontiac, Oldsmobile), which is included below. Catalyst Monitor Drive Cycles. Step Three: Take Note of Which Drive Cycle Monitor(s) Did Not Complete. But what does a drive cycle look like? Here is an example drive cycle for a GM. The main intention of the GM OBD-II cycle is to run the OBD-II Main Monitors in order to determine the status of the I/M readiness tests and to have the PCM relearn after a low of power or Keep Alive Memory and errors lost. Drive cycle 3 Answers. Well Ive driving this joker about 200 miles and had about 24 ignition cycles, even tried the GM Drive cycle posted online at many websites. I have done the GM drive cycle (55 mph for 5 minutes, etc. Texas allows you to have one monitor incomplete, and I have chosen the evap monitor since the check engine light could pop back on. Catalyst Monitor Drive Trace. After reading the above table, you probably noticed that many of the readiness tests require a certain condition to be met to allow them to complete successfully. The non-continuous checks are the EVAP monitor which is evaporative emission control system, the HEGO monitor which is the heated exhaust gas oxygen sensor, and the catalyst efficiency monitor. Hold Steady Speed. During this time, in addition to the diagnostics performed in step 4, the catalyst monitor diagnostics will be performed. Freeze Frame Whenever an emissions related malfunction occurs, OBD II stores the operating parameters (conditions) present at the time the malfunction occurs. How to Perform a Chevy Tracker Drive Cycle. If you just drive the vehicle on one trip of 200 miles, it won't meet the number of drive cycles requirement. I have done several drive cycles and cleared the codes 4 times. Drive your vehicle to your regular shop and have them re-check your readiness monitors, present codes, and pending codes. 7 Steps to Follow When Catalyst Monitor Not Ready. Before that I drove the car for a good 200 miles but no particular drive cycle. General Motors Driving Cycle Accelerating and decelerating are important parts of resetting the OBDII Drive Cycle. 6L Duramax has been in production since 2001 and has proved, on a large scale, to be a relatively reliable and durable platform. Monitors not Ready 2004 Dodge Neon Srt-4 No check engine light on the car and I have taken the car to smog and failed. 6L Duramax Diesel. OBD2 Drive Cycle – An OBD2 Drive Cycle is an extended set of driving procedures that takes into consideration the various types of driving conditions encountered in real life. I replaced my battery and it's time for my inspection and they're telling me it's not reading on the computer and I need to drive my vehicle. If the catalyst is marginal or the battery has been disconnected, it may take 5 complete driving cycles to determine the state of the catalyst. All other monitors are fine and I've done the drive cycle at least 4 times now with no luck. General Motors Generic Drive Cycle January 26, 2017 January 28, 2017 Monitor Drive Cycles , On Board Diagnostics (OBDII) 0 The following is the recommended OBD II monitor drive cycle for many General Motors vehicles. Because of the O2 sensor not going to ready, I had to force the evap to complete by using my Tech 2. What Causes the Catalytic Converter to Fail. Note: Due to the limited preconditions provided with this drive trace, NCVECS recommends using the monitor specific drive traces for Chrysler vehicles. What the OBD-II is saying is: Oxygen sensor monitor incomplete Evap system monitor incomplete Catalyst monitor incomplete I already took it to the BMW dealer (: and the computer flashed. The OBD-II drive cycle begins with a cold start (coolant temperature below 122 degrees F and the coolant and air temperature sensors within 11 degrees of one another). The steps should generally be the same but refer to an authorized Jaguar repair/service guide or possibly owners manual to confirm steps for your Jag. The Engine Control Module monitors the switching frequency ratio of heated oxygen sensors 1 (front O2 sensor) and heated oxygen sensors 2 (rear O2 sensor). To actually drive the car in the method required to reset all monitors is almost impossible. I ran about 15 drive cycles (early in the morning 4AM) in about 20 days, determined to get these monitors cleared. Well Ive driving this joker about 200 miles and had about 24 ignition cycles, even tried the GM Drive cycle posted online at many websites. Nissan has provided driving cycles in its service information to allow monitors to operate. This will perform the same diagnostics as in step 5. List of supported OBD-II parameters and sensors by OBD Auto Doctor OBD2 scantool software. In these instances, when the all monitor status is NO, the vehicle must be driven on a complete drive cycle that runs all monitor tests. Computers and On-Board Diagnostics 623 Figure 26–5 Typical list of early 1990s diagnostic trouble codes (DTC). The following are some sample drive cycles for the catalyst monitor to run. Misfire Detection Monitor The misfire detection monitor is an on-board strategy designed to monitor engine misfire and identify the specific cylinder in which the misfire has occurred. " The drive cycle is to let the car run its on-board diagnostics. Some "logged" codes require 5-8 complete drive cycles before they will reset (and can't be reset easily via the OBD2 port). 5) Turn key off, leave off for ten minutes (to run O2 sensor heater monitor). If the catalyst is marginal or the battery has been disconnected, it may take 5 complete driving cycles to determine the state of the catalyst. I want to sell it but I keep getting told the catalyst monitor is not ready. During this time, in addition to the diagnostics performed in step 4, the catalyst monitor diagnostics will be performed. EVAP "not ready" when scanned today. Consult your vehicle's service manual for OBD 2 Drive Cycle procedures. If the catalyst is marginal or the battery has been disconnected, it may take 5. On Chryslers, we always start the drive cycle with a morning cold start. Frustration with GM EONV testing I do the GM idle catalyst monitor right in my lot. Emissions Readiness The Vehicle’s Engine Control Module (ECM) performs two types of tests on the vehicle’s emission system. In these instances, when the all monitor status is NO, the vehicle must be driven on a complete drive cycle that runs all monitor tests. Final Aftertreatment Operating Mode is DeSoot. I know you should be able to get the tests to trigger (i. Stephen Levijoki Engineering Group Manager - Propulsion Calibration Analysis at General Motors Swartz Creek, Michigan Automotive 2 people have recommended Stephen. Re: OBD II Code Reader Questions « Reply #18 on: Jul 28, 2016, 05:56:53 PM » there blinking because the computer has not ran its drive cycle for those items. It's not really a monitor, but a switch to say that all of the main test are not done yet. A "Trip" Drive Cycle provides the "Enabling Criteria" for one specific Monitor to run and. The DOC/DPF/DEF system will also allow for better fuel economy because fewer active exhaust regeneration cycles will be required than last year's trucks. Before that I drove the car for a good 200 miles but no particular drive cycle. I left the car at the Ferrari dealer and they did the drive cycle many times (200+ miles) and it never came on. The main intention of the GM OBD-II cycle is to run the OBD-II Main Monitors in order to determine the status of the I/M readiness tests and to have the PCM relearn after a low of power or Keep Alive Memory and errors lost. As I stated previously, my '01 cavalier Fuel Sys, Comp, and 02 sensor were NOT READY. Enhanced Jaguar Engine Module List - autoenginuity ,AutoEnginuity OBD2 (OBDII) Scan Tool is a professional Windows-PC diagnostics scan tool for all OBD2 (OBDII) compliant vehicles. It is almost impossible to complete without the proper location but if you get as close as you can it will still work. If the catalyst is marginal or the battery has been disconnected, it may take 5 complete driving cycles to determine the state of the catalyst. And that means you must complete a drive cycle. During this time, in addition to the diagnostics performed in step 4, the catalyst monitor diagnostics will be performed. OBD II Drive Cycle Procedure. If the catalyst is marginal or the battery has been disconnected, it may take 5 complete driving cycles to determine the state of the catalyst. Cold Start. What Could Cause My Catalytic Converter To Read "Not Ready"? in four-wheel drive for 30 minutes straight. 0 liter 200SX - These vehicles may have a high degree of "not Ready" for catalyst and evaporative monitors due to a "trip based" design. As a result, the vehicle is burning more fuel and is not operating as cleanly as it was. I then started my research and found the GM Drive Cycle here on this board. You cannot set the readiness monitor because the code keeps coming back and you clear the code which clears the monitors. However, to satisy all of the different Trip enable criteria and run all of the OBD II diagnostic monitors, the vehicle must be driven under a variety of conditions. Well I did with paying whooping $400 (first mistake I guess). If the catalyst is marginal or the battery has been disconnected, it may take 5 complete driving cycles to determine the state of the catalyst. All other monitors are fine and I've done the drive cycle at least 4 times now with no luck. This catalyst monitor needs to run in order for me to get inspected, and is due. Probably not, but you should test it to make sure it is alive and well. The only info I have been able to find are these instructions below, but these are generic, there are suppose to be more specific instructions to say maybe like GM, Ford, Dodge etc. As a result, the vehicle is burning more fuel and is not operating as cleanly as it was. ⇒ If the O2S Heater System Status indicator displays NO, ensure that the ignition has been turned OFF for at least 10 hours. There are a few things worth knowing about this GM OBD2 Drive Cycle, and using it to flip your OBD2 Readiness Monitors to "Ready" or "Complete" so you can take your vehicle to the Smog Center and have it pass the test. Take caution when performing drive cycles on public roadways. Start, then idle the engine in Drive for 2 1/2 minutes with the a/c and rear defogger on. The OBD-II Drive Cycle is a key-on, key-off cycle that must satisfy all the Enable Criteria for all the applicable Monitors on a particular vehicle to run and complete their diagnostic testing. Hold Steady Speed. 6- Hold Steady Speed. 0 liter 200SX - These vehicles may have a high degree of "not Ready" for catalyst and evaporative monitors due to a "trip based" design. See the complete profile on LinkedIn and discover Jaideep’s connections and jobs at similar companies. It is not uncommon for the readiness monitors to go "not ready" when the battery is disconnected. But what does a drive cycle look like? Here is an example drive cycle for a GM. That's the whole point of the readiness monitors, to test and verify the functionality of each component/system. General Motors (specific) OBD II Drive Cycle Performing a GM OBDII Driving cycle: 1. I have a regular scan gauge and I have drove over 400 miles. The next drive cycle doesn't begin until the engine has been shut off, allowed to cool back down and is restarted again. Plymouth 1996 built prior to. The WLTP results were also close to RDE for PN emissions, but not for NOx and other gases. Sometimes it takes a longer run for all the monitors. It may be possible to process an engine to meet TODAY'S requirements, but may not be compliant by the time your project is completed. Got codes? Read these informative engine light articles and get professional advice from automotive technicians to help you get a handle on check engine light codes and testing procedures. The DOC/DPF/DEF system will also allow for better fuel economy because fewer active exhaust regeneration cycles will be required than last year's trucks. For some people who are constantly flashing in a tune and making changes to their cars, or for those of you who put very few miles on the car each year, this can be a major nuisance should you need to diagnose the vehicle or require the car to have the monitors in a ready state. If you want to get your vehicle inspected, your car’s readiness monitors must be ready to test. An SRT or System Readiness Test is basically the PCM running a check on the 5 main emission controls that the OBDII test checks. Note: Due to the limited preconditions provided with this drive trace, NCVECS recommends using the monitor specific drive traces for Chrysler vehicles. GM auto repair and tune up inc. Conditions can include things like driving for 2 mins at 55mph steady, then slow down to 25mph for 30 secs while in second gear etc etc. Outside temperature must be above 14E F (-10E C). Drive Cycles What constitutes a DRIVE CYCLE can vary from monitor to monitor and across all makes and models. During this time, in addition to the diagnostics performed in step 4, the catalyst monitor diagnostics will be performed. I will come in and tell you what is going on unless someone else does. As I stated previously, my '01 cavalier Fuel Sys, Comp, and 02 sensor were NOT READY. o PCM Connector Pin Information (B. a drive cycle and my EVAP system monitor is. So your car or truck. If the catalyst is marginal or the battery has been disconnected, it may take 5 complete driving cycles to determine the state of the catalyst. A P0420 code is a trouble code on OBD-II equipped vehicles. 5) Turn key off, leave off for ten minutes (to run O2 sensor heater monitor). By following the below GM "Drive Cycle" I cleared the 02 sensor but ironically enough as it explains what to do and states which sensors will be turned on by doing so, there is nothing on the Drive Cycle that says anything about "turning on" the Evap System. Different manufacturers have different cycles. EPA) Arvon L. ) Heated Oxygen Sensor (HO2S) Monitor -•HO2S signal circuit malfunction - P0131, P0136, Information P0151, P0156 The HO2S Monitor is an on-board strategy •HO2S slow response rate - P0133, P0153 designed to monitor the HO2S sensors for a •HO2S heater circuit malfunction. The main intention of the OBD II Drive Cycle is to run the OBD II Main Monitors in order to determine the status of the Inspection & Maintenance (I/M) Readiness Tests. And that means you must complete a drive cycle. BMW: Drive Cycles are not included in the BMW public web site or owner's manual. The composite vehicle type 4 powertrain control system is based on designs common to many vehicle. The GM EVAP monitor procedure is a known trouble spot for all GM vehicles (regardless of any tunes or the AFM Disabler being installed). Evap monitors are the most difficult to go "Ready". CATALYST (A/F SENSOR) MONITOR DRIVE CYCLE Certain Models 1998-2002 Pre-Conditioning Requirements: MIL must be off. complete the monitor. As a rule of thumb, 50 miles of mixed highway and city driving as well as letting it sit overnight and driving it again for 15 more miles in the same conditions will let most monitors run. I then started my research and found the GM Drive Cycle here on this board. This assumes that the light you see is simply an emissions service reminder light and not a failure light. However, I have driven the truck for about 2 weeks and the Catalyst monitor still says incomplete. This is untrue. Chrysler Group will extend the warranty for consumers who bought certain 2011-13 vehicles with 3. Step One: How to Prepare Your Vehicle. EVAP monitor will only run with nmore than 1/4 tank fuel. The main intention of the GM OBD-II cycle is to run the OBD-II Main Monitors in order to determine the status of the I/M readiness tests and to have the PCM relearn after a low of power or Keep Alive Memory and errors lost. Have the fuel tank between 30 and 70 percent full. This article supersedes TSB 14-0142 to update the Title, Issue Statement, model years and Service Procedure. We have found that some GMs with thermostat/cooling system issues are unable to warm up properly and in turn will not complete the catalyst monitor. OBD systems give the vehicle owner or repair technician access to the status of the various vehicle subsystems. 7 Steps to Follow When Catalyst Monitor Not Ready. EVAP SYSTEM MONITOR DRIVE CYCLE INSTRUCTIONS Do not turn off the ignition switch during the test procedure. In the earlier days of Cat’s, car companies use to run very rich to heat up the cat quickly. The P0420 code is a very popular one and that's why there's a site dedicated to that specific trouble code. I have the GM drive cycle and have used it several times, but I can not get the catalyst monitor to complete. The status of the. Autel manual states that "N/A" = "Monitor is not supported on that vehicle. How to Test Trouble Code P0420 (GM 3. NMHC System Monitor [**NMHC Catalyst Monitor**]; The following conditions must be met: Coolant temperature must be over 140°F (60°C). was the battery recently disconnected, or dead, and battery installed? every vehicle has a different drive cycle, I would look up your specific vehicle for what you need to do. Using Emissions Drive Cycles to Verify Repairs verify a catalyst repair in just over 80 seconds. Catalyst Monitor Not Ready? Secondary Air ? This is a discussion on Catalyst Monitor Not Ready?Secondary Air ? within the Computer & Tuning forums, part of the LSx Technical Help Section category; I recently failed inspection because of the following: Catalyst Monitor Not Ready and Secondary Air Not Ready. If the catalyst is marginal or the battery has been disconnected, it may take 5 complete driving cycles to determine the state of the catalyst. Drive cycles are important requirements for the OBD II system to set the monitors and perform self-diagnosis. The Ultimate 88-98 GM Truck. Symptoms of a P0420. While various versions of the engine have surfaced over the years, all generations of the Duramax are based on the same foundation. If you don't have access to drive cycles/drive traces, they should be available from a qualified service technician or dealership. LCD DISPLAY--Indicates test results. The vehicle will fail until the required number or types of readiness monitors are tested. I cleared the. My car went for inspection about 10 days ago and couldn't do the emissions test because my on board diagnostic computer was "not ready" for 4 tests: Catalyst EGR Evap System O2 sensors I was told to "drive it for a while" or do a drive cycle per GM suggestion and the computer will "re-set" in time. This means that the ability to write new posts and access various member features will go away. This will perform the same diagnostics as in step 5. 7L diesel engine and built on or before 8/20/2014 may exhibit a condition where the engine only idles with an instrument cluster anti-tampering warning message that includes the words Engine Idled Exhaust Fluid System Fault. The OBD-II Drive Cycle is a key-on, key-off cycle that must satisfy all the Enable Criteria for all the applicable Monitors on a particular vehicle to run and complete their diagnostic testing. Catalyst Monitor Procedure To activate catalyst monitor, drive vehicle at cruise in stop and go traffic. Add or subtract as necessary, but it comes down to no more than about nine monitors on even the most complex system. The main intention of the OBD II Drive Cycle is to run the OBD II Main Monitors in order to determine the status of the Inspection & Maintenance (I/M) Readiness Tests. During this time, in addition to the diagnostics performed in step 4, the catalyst monitor diagnostics will be performed. Lastly, you have to complete a "drive cycle. Here is a typical Honda Accord drive cycle. This "drive cycle", which should not be performed by inexperience drivers, is designed to allow monitors to operate in a compressed time and distance drive pattern. Well I did with paying whooping $400 (first mistake I guess). Three of the OBD II monitor flags still show "not ready" on the scanner after three days of driving every drive cycle that I know to work on other makes of vehicles. Warm-ups Since DTCs Cleared - number of warm-up cycles since all DTCs were cleared via a scan tool. The drive cycle begins with the engine cold (coolant temperature below 122/F and the coolant and air temperature sensors within 11/ of one another).