I have tried the recommended reset profile for the 'catalytic mon" on my 2002 Chevy Monte Carlo which was 55 mph for 5 minutes, 5 times and the catalytic mon still read "inc" How do I get this to read OK


Asked by Aug 14, 2015 at 02:33 PM about the 2002 Chevrolet Monte Carlo SS

Question type: Maintenance & Repair

The car started performing poorly and it was determined to be the "catalytic converter" this
was replaced and now, after more than 100 miles, including the above profile, the catalytic
monitor still reads "inc"

6 Answers


keep driving, you need stop and go traffic, more highway miles...

1 of 1 people found this helpful.

You need to keep the gas tank between 1/4 and 3/4 full. No more and no less. Otherwise this readiness monitor will not set. Just drive normally for about 1 week. If you have other issues that are keeping the check engine light on, those need to be repaired as well. Since your Monte Carlo is an '02 model you can, under Federal Law, pass emissions inspection with 1, but only 1, readiness monitor not set. The EVAP system is the hardest one to set. If you can't get it to set, don't worry about it. As long as all the others are set you'll pass the emissions test. HTH -Jim

1 of 1 people found this helpful.

I do not have a check engine light on and if what you say is true, I should be good to go for inspection, The only system that is not reading OK is the Cat monitor, all others read OK or N/A, thanks for this info.

1 of 1 people found this helpful.

You're welcome. Glad to help. Yes, if the "catalyst" is the only readiness monitor not set, and the check engine light is not on, you'll pass. -Jim

1 of 1 people found this helpful.
Best Answer Mark helpful

Just wanted to let you know,car passed with Cat mon inc ;~D

1 of 1 people found this helpful.

Awesome!! Thank you for letting us know. Very glad to hear that!! -Jim

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