Engine codes

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May 22, 2008 | 08:59 PM

cereb6

Thread Starter

Joined: Jun 2007

Posts: 15

From: Texas

Engine codes

My car is throwing the code P1131 and 1151. The rpm's are running to around 2 grand then falling to about 800 by itself. It revs up and down without me touching the gas. When I am driving and take it out of gear to stop it takes forever for the rpm's to fall back down to normal. I replaced the MAF and it is still doing it. Help. Thanks. Does anyone know what these codes mean?

May 23, 2008 | 09:37 AM

acascianelli

5th Gear Member

Joined: Jul 2006

Posts: 4,409

From: Sterling Heights, MI

RE: Engine codes

Quote:

ORIGINAL: cereb6

My car is throwing the code P1131 and 1151. The rpm's are running to around 2 grand then falling to about 800 by itself. It revs up and down without me touching the gas. When I am driving and take it out of gear to stop it takes forever for the rpm's to fall back down to normal. I replaced the MAF and it is still doing it. Help. Thanks. Does anyone know what these codes mean?

P1131: Lack of Upstream Heated Oxygen Sensor Switch - Sensor Indicates Lean - Bank No. 1.
P1151: Lack of Upstream Heated Oxygen Sensor Switch - Sensor Indicates Lean - Bank No. 2.

May 23, 2008 | 10:01 AM

cereb6

Thread Starter

Joined: Jun 2007

Posts: 15

From: Texas

RE: Engine codes

Thanks alot man. Does that mean that I need a new oxygen sensor? Do you know what parts I need to buy? Thanks again.

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May 24, 2008 | 01:52 AM

Stepman

4th Gear Member

Joined: Mar 2004

Posts: 1,090

From: Az

RE: Engine codes

Being lean on both sides, I think it's time to check your fuel pressure. Maybe due for fuel filter.

May 25, 2008 | 03:22 PM

grogan

3rd Gear Member

Joined: Mar 2008

Posts: 811

From: maryland

RE: Engine codes

i got those same codes and then some.my car is going in on tuesday for a tune so ill let u know what they tell me.

May 25, 2008 | 03:38 PM

TripleHmotosports

1st Gear Member

Joined: Sep 2007

Posts: 109

RE: Engine codes

Check for a vacuum leak.

May 26, 2008 | 08:47 PM

cereb6

Thread Starter

Joined: Jun 2007

Posts: 15

From: Texas

RE: Engine codes

Thanks bro.

May 26, 2008 | 08:48 PM

cereb6

Thread Starter

Joined: Jun 2007

Posts: 15

From: Texas

RE: Engine codes

That would be awesome and really helpful man. Thanks alot and hopefully it doesn't cost you an arm and a leg.

Jun 12, 2008 | 09:39 PM

cereb6

Thread Starter

Joined: Jun 2007

Posts: 15

From: Texas

RE: Engine codes

Hey man. When you took your car in what did they tell you? Is it a vacuum leak? Did they tell you it was the MAF? Please let me know what you found out. Thanks alot bro.