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We understand your Chevy Silverado is having difficulty getting certain emission monitors to complete become Ready. The emission monitors are programmed to run while your vehicle is being normally operated.

However, due to different driving habits, the criteria required to run a monitor may not always be met. Following the Chevy Silverado drive cycle below should allow all emission monitors to complete. The drive cycle must be followed accurately.

Take extra caution when performing the drive cycle on public roadways. Perform the drive cycle at your own risk. Perform the drive cycle safely and obey all traffic laws. Mode 6 emissions diagnostics tool is especially helpful when trying to complete emission monitors. A well trained smog technician will be able to use Mode 6 to manually run emission monitors.

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If after completing the drive cycle your Silverado will still not complete any or all the monitor s we have to recommend visiting a Chevy dealer or the smog check repair center.

We should note, the secondary air injection monitor which checks for the performance of the air injection system and air injection pump requires the monitor run during a cold engine start. Once the engine warms up, the monitor is done checking the air injection pump and will continue on checking the performance of the remainder of the AIR injection system.

With that said, it's not the number of miles driven which resets the air injection monitor, rather the number of cold starts required to get all the other parameters required for the air injection monitor to to run. Starting the engine after the vehicle has sat for at least 8 hours in normal weather conditions would be considered a "Cold Start". Since the air injection monitor takes into effect ambient air temperature, it is best to perform a cold start on a morning.

Do not leave the key on prior to the cold start or the heated oxygen sensor O2 diagnostic may not run. As soon as possible apply half throttle until 55mph is reached. Do not brake or shift in order to slow down.

How to Do BMW OBDII Drive Cycle for Smog Check

This will perform the same self tests as during the first acceleration step. This time at 55mph for five minutes. If the catalyst Catalytic Converter is marginal or the battery has been disconnected, it may take 5 complete driving cycles to determine the state of the catalyst,or in order to Complete the CAT Monitor. Remember not to press the brakes or shift gears don't press the clutch if equipped.

This ends the drive cycle.

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Following the Chevy Silverado drive cycle above should allow all emission monitors to complete. Once again, take extra caution when performing the drive cycle on public roadways and perform the drive cycle at your own risk. Drive your truck safely and obey all traffic laws. Should you want to perform specific Monitor self-tests follow the steps below. Slow vehicle down to 20 mph.In order for the PCM to properly execute all the readiness monitors on a particular vehicle, an OBD II drive cycle needs to be driven to achieve the enabling conditions for each monitor.

The type of monitor you are trying to execute can also dictate the type of driving you need to perform. Typically, a few days of normal driving, both city and highway, will make the monitors ready. The following generic drive cycle can be used as a guideline if a specific drive cycle is not known. It will assist with resetting monitors when a car specific drive cycle is not available.

obd2 drive cycle

However, it may not work for all vehicles and readiness monitors. This condition is easily achieved by letting the car sit overnight. The ignition key must not be left on prior to the cold start. Otherwise the heated oxygen sensor diagnostic may not run. Decelerate coast down to 20 mph without braking or depressing the clutch for manual transmissions. Hold at a steady speed for five minutes.

Decelerate coast down to a stop without braking.OBD2 Readiness Monitors are simple yet powerful self check routines. This post will explain in detail what the readiness monitors are. The monitors are also known as Emissions Monitors. Cars may perform up to 11 system tests or routines.

How to Pass Inspection & Complete a Drive Cycle

These tests are so called readiness monitors. There are two different types of readiness monitors: continuous and non-continuous. Continuous monitors are different in design from the non-continuous ones. Continuous monitors are being constantly tested and evaluated while the engine is running.

The non-continuous monitors need certain conditions to be met before a test can be completed. The conditions necessary to run the non-continuous self-diagnostic tests vary. Some monitors require that the car follows a predefined drive cycle routine. Some require two drive cycles because of the need for a cool down and warm up periods between. Each emission monitor can have different requirements for the conditions.

obd2 drive cycle

In the latest standard edition, this definite allocation is no longer present for all of them. Non-continuous monitors are different for spark ignition cars gasoline engines and compression ignition cars diesel engines. Traditionally, the only monitor status was the status since the diagnostic trouble codes were cleared. This readiness monitor status is mandatory for all OBD2 compliant vehicles.

It will show the long term status after the check engine light was reset and the DTCs cleared. As the OBD2 has evolved, newer vehicles can now report emission monitor status also for the current driving cycle. These monitors start from the beginning every time when the monitoring cycle begins. Older cars might not support this feature. Readiness monitor test result yields the monitor status. Each readiness monitor will have its own output status. The completion status can be:.In this video I'll show you how to complete a drive cycle and pass inspection after turing off your check engine light.

It is true that your car will not pass inspection if the check engine light is on. However there is more to it than simply turning it off. By the way the easiest way to turn off the check engine light would be to disconnect the battery for 30 seconds. Inorder to pass inspection your car needs to complete a full drive cycle so that all 8 internal monitors have a status of "Ready". If any of the 8 monitors have a status of "Incomplete" that means you have not yet completed a full drive cycle and you need to drive your car around more.

Usually if your check engine light is on that means you need some repair work done on your car but that is not always the case. I drive a Chevy Impala and the check engine light has been coming on for about 4 years. The trouble code is "P". Back in when I first noticed the problem I had the catalytic converter replaced. At that time the performance of the Impala was greatly reduced.

Specifically when ever the accelerator was pressed there was a significant time delay before the car would accelerate. It almost seemed as if the transmission was slipping and then suddenly it would catch and the car would accelerate. The problem however was not the automatic transmission.

How to Complete a Drive Cycle

There was a carbon blockage that clogged the air flowing through the power train. Exhaust was escaping through the EGR valve because the catalytic convert was blocked up so much. So I bought the new catalytic converter. That was news to me. About two or three months after the catalytic convert was replaced the check engine light came on again.

The same "P" trouble code was being stored in the engine control module. Again the "P" trouble code came back.To complete a specific monitor for repair verification, follow steps 1 through 4, then continue with the step described by the appropriate monitor found under the "OBDII Monitor Exercised" column. When the ambient air temperature is outside 4. If the P code must be cleared in these conditions, the PCM must detect them once twice on some applications before the EVAP monitor can be "bypassed" and the P cleared.

The Evap "bypassing" procedure is described in the following drive cycle. Consult the instruction manual for each described function. Operating the throttle in a "smooth" fashion will minimize the time required for monitor completion. The Evaporative Monitor can only operate during the first 30 minutes of engine operation. When executing the procedure for this monitor, stay in part throttle mode and drive in a smooth fashion to minimize "fuel slosh".

For best results, follow each of the following steps as accurately as possible:. Install scan tool. Turn key on with the engine off. Cycle key off, then on. Bypasses engine soak timer. Idle vehicle for 15 seconds.

Prep for Monitor Entry 4. Is IAT within 4. If Not, complete the following steps but, note that step 14 will be required to "bypass " the Evap monitor and clear the P HEGO 5. Executes the HEGO monitor. EVAP 6. Drive in stop and go traffic conditions. Executes the Catalyst Monitor. EGR 8. Repeat 3 times. Executes the EGR Monitor.

Bring the vehicle to a stop. CCM Trans Stop for at least 20 seconds and repeat step 10 five times. Executes the transmission portion of the CCM.All Monitor Drive Trace Idle for 5 minutes Warm engine up for five minutes Smoothly acceerate and maintain a speed between 40 to 60 mph for 8 minutes.

Stop and idle for 3 minutes. Smoothly accelerate and maintain a speed above 20 mph for 2 minutes. Turn key off, leave off for ten minutes. Catalyst Monitor Drive Trace Idle for 5 minutes Smoothly accelerate and maintain a speed between 30 to 45 mph for 2 minutes. Idle for 3 minutes. Idle for 5 minutes Smoothly accelerate and maintain a speed between 30 to 45 mph for 2 minutes.

Trace 2: Leak Detection Pump From hours of the vehicle being off cold soakidle for 5 minutes Drive in city traffic naturally with stops and acceleration for 5 minutes. Idle vehicle for 4 minutes. Stop and idle for 30 seconds. Smoothly accelerate and maintain a speed between 30 to 40 mph Repeat idle and acceleration to mph five times. O2 Sensor Heater Monitor Drive Trace Idle for 5 minutes, then shut the engine and leave the vehicle off for 10 minutes. Save my name, email, and website in this browser for the next time I comment.

Turn on the ignition to ON, but do not start the engine. The check engine light f the MIL will turn on for 15 seconds. After 15 seconds, one of two things will happen.

If the MIL does not flash and remains fully lit, you are ready to go to the smog station. For all drive cycles, make sure the check engine light MIL is off. Turn key off, leave off for ten minutes Catalyst Monitor Drive Trace Idle for 5 minutes Smoothly accelerate and maintain a speed between 30 to 45 mph for 2 minutes. Call Now.I own a Mercedes CLK. How do I reset the computer in the shortest time possible, alon with completing the emission monitors? Please take extra caution while performing drive cycles on public roadways.

Drive cycles can be difficult to follow under normal driving conditions. Note: The drive cycle test needs to be done two 2 consecutive times.

How to Use an OBD-II Scan Tool

Prior to driving the vehicle read the drive cycle instructions carefully and completely to ensure successful test result. After this test step has been completed, turn ignition OFF, wait 10 seconds and repeat this test step again. NOTE: It is recommended to perform this test while the engine is cool. Drive Cycle Test Procedure Explained 1.

No smog check? No problem. Pay your DMV renewal fees now and avoid penalties! NeedTags - OL California authorized online vehicle registration service provider. All Rights Reserved. Smog questions might be posted on our online forum to assist other vehicle owners. No personal information is published.

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obd2 drive cycle

Failed Smog Test. Related questions and answers you might find useful: Saturn Vue with 3.