What is the drive cycle for emissions testing?

2002 CHEVROLET MONTE CARLO
173,847 MILES
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Emissions test won't read it and check engine light is not on.
Dec 31, 2012 at 8:33 PM
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KASEKENNY
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More than likely, you are failing for one of two reasons. Either the monitor is failing, or you have a P1000 code which indicates the same thing.

However, the P1000 failure doesn't tell us which monitor needs to run so we will need to do all the drive cycles.

https://www.2carpros.com/articles/scan-test-is-incomplete-p1000

Clearly these will run under normal driving but that will take up to a couple weeks or more depending on your driving.

Please see the attached info for more detail and let me know if you have other questions. Thanks
Feb 9, 2022 at 3:44 PM