converter will not reset, but there is no check engine lights on

Asked by Oct 15, 2015 at 08:23 PM about the 2008 Pontiac Grand Prix

Question type: General

1 Answer

75,645

For the catalytic converter readiness monitor to set the gas tank must be between 3/4 and 1/4. No more and no less. Then just drive normally for a few days. It'll set. If you're trying to pass emissions inspection, your '08 model can have 1, but only 1, readiness monitor not set and it will pass. This is under Federal Regulation. So if this is the only one that's not set, go ahead and take it through. It'll pass. HTH. -Jim

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