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Re: GM cat monitor/ monitors setting in order
Posted to Technical Discussion Forum on 9/4/2018 8 Replies

Yes, EVAP monitor never ran due to my controlling fuel level. I eventually had to add fuel to get to test lane, but by then cold soak timer had been interrupted. It took about 6 minutes to add 3.3 gallons which confirmed the P0446. Login to read more.

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