Engine codes

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05-22-2008, 08:59 PM

cereb6

Thread Starter

Join Date: Jun 2007

Location: Texas

Posts: 15

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?

05-23-2008, 09:37 AM

acascianelli

5th Gear Member

Join Date: Jul 2006

Location: Sterling Heights, MI

Posts: 4,409

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.

05-23-2008, 10:01 AM

cereb6

Thread Starter

Join Date: Jun 2007

Location: Texas

Posts: 15

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.

[IMG]local://upfiles/72517/FD2611D148C24495AE0322D1E89C72CD.jpg[/IMG]

05-24-2008, 01:52 AM

Stepman

4th Gear Member

Join Date: Mar 2004

Location: Az

Posts: 1,090

RE: Engine codes

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

05-25-2008, 03:22 PM

grogan

3rd Gear Member

Join Date: Mar 2008

Location: maryland

Posts: 811

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.

05-25-2008, 03:38 PM

TripleHmotosports

1st Gear Member

Join Date: Sep 2007

Posts: 109

RE: Engine codes

Check for a vacuum leak.

05-26-2008, 08:47 PM

cereb6

Thread Starter

Join Date: Jun 2007

Location: Texas

Posts: 15

RE: Engine codes

Thanks bro.

05-26-2008, 08:48 PM

cereb6

Thread Starter

Join Date: Jun 2007

Location: Texas

Posts: 15

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.

06-12-2008, 09:39 PM

cereb6

Thread Starter

Join Date: Jun 2007

Location: Texas

Posts: 15

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.