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pontiac keeps giving codes

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New User

Mar 10, 2012, 7:50 PM

Post #1 of 3 (1810 views)
pontiac keeps giving codes Sign In

i have a 2006 pontiac gran prix with a 3.8 supercharged engine.after car has si over night,when i come and start it up it sputters for about 15 to 20 seconds then idles out.later code po300,po420,po068 shows of these will show up after awhile.even when i clear them out eventualy one will show back up ,sometimes all together.then also i lose engine power when traction control comes on reducing engine power. any kind of help will be welcomed. my car has 104,000 miles

Hammer Time
Ultimate Carjunky / Moderator
Hammer Time profile image

Mar 10, 2012, 8:36 PM

Post #2 of 3 (1775 views)
Re: pontiac keeps giving codes Sign In

You need to get a fuel pressure gauge hooked p before starting it to observe the fuel pressure as the problem occurs.


We offer help in answering questions, clarifying things or giving advice but we are not a substitute for an on-site inspection by a professional.

New User

Mar 11, 2012, 10:44 AM

Post #3 of 3 (1739 views)
Re: pontiac keeps giving codes Sign In

thanks i will try that today

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