How to perform a basic drive cycle-repairpal?
The Drive Cycle and Emissions Readiness Monitors have, for the most part, stopped this unethical tactic. Here are step-by-step instructions on how to perform a basic, yet very effective, drive cycle that will complete the readiness monitors for your vehicle’s emissions control system.
What to do when the drive cycle won’t start?
But if the oxygen sensor and catalyst monitor are ready, then the heater has to be working or the other two monitors would fail and set codes. If the EVAP monitor is not ready, verify that your fuel cap is tight and the level of fuel is between 1/4 and 3/4 full. If all the other monitors are ready, then do a couple more “cold” starts.
When does the PCM suspend the drive cycle?
If your battery is more than four years old, replace it and re-run the Drive Cycle. Even though your car may start just fine, the PCM is hypersensitive to the slightest glitch in the battery. It will suspend the Drive Cycle if it is not happy with any aspect of battery performance and/or charging system performance.
Do you need to clear fault codes before a drive cycle?
After completing any emissions-related service, you need to clear all OBD-II diagnosis fault codes by using a professional digital scanner. This needs to be completed prior to beginning the actual drive cycle test.
The Drive Cycle and Emissions Readiness Monitors have, for the most part, stopped this unethical tactic. Here are step-by-step instructions on how to perform a basic, yet very effective, drive cycle that will complete the readiness monitors for your vehicle’s emissions control system.
How to do an OBDII cold start drive cycle?
The following drive cycle is from http://www.obdii.com/drivecycle.html: To perform an OBDII Driving cycle, do the following: 1. Cold Start. In order to be classified as a cold start the engine coolant temperature must be below 122°F and within 11°F of the ambient air temperature at startup.
What should I do if my drive cycle won’t work?
Also, if the battery is weak or undercharged, some of the most important tests will never run. The vehicle must sit overnight, or for at least eight hours, in an environment that is less than 90° F. The engine temperature needs to match the air temperature in order to establish an accurate baseline for the testing.
How long should a car sit for a drive cycle?
Ensure your battery and alternator are in good shape. Jump-starting a vehicle can be a death sentence for the PCM. It can also negatively impact the drive cycle test. Let the vehicle sit for more than 8 hours.