2004 GMC Yukon Denali XL 6.0 V8

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May 18, 2022 | 03:15 PM

hasibkhan

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2004 GMC Yukon Denali XL 6.0 V8

Hi All,

I have two error codes P0300 and P0446. For P0300 i have replaced the spark plugs and wires and for P0446 i have replaced the gas cap but the code is still there.

Thank you.

May 18, 2022 | 03:31 PM

Mike

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Did you CLEAR the codes?

May 18, 2022 | 04:41 PM

hasibkhan

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Quote:

Originally Posted by Mike

Did you CLEAR the codes?

yes I did twice

May 18, 2022 | 05:40 PM

carfixer007

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What code is still there the misfires or the evap?

May 18, 2022 | 07:35 PM

hasibkhan

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Both codes are still there

May 18, 2022 | 10:37 PM

carfixer007

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How does it run? History? Give us some info or we will not be able to help you.

May 19, 2022 | 02:17 AM

hasibkhan

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The truck runs fine it is as smooth as when I bought it new in 2004 it only has 107000 miles and always being serviced at GM dealership I replaced the spark plugs and wire and the gas cap over the weekend.

May 19, 2022 | 09:26 AM

Mike

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Just to verify...
Key On, Engine Off... clear faults
Key Off.
Key On, Engine Off, READ faults.
Report back.

May 19, 2022 | 09:29 AM

Mike

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If the faults are still there after reading them again, something is wrong with your scanner and its not clearing them.

May 19, 2022 | 12:20 PM

#10

hasibkhan

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Hi Mike, I will try that and get back thank you.

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