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?

acascianelli

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.

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2007 Mustang GT
Bamachips Race Tune
Sequential Tail Lights
Steeda Billet CMDP
Hurst Short Throw
Pypes O/R X-pipe
C&L Racer Intake
5 Speed Manual
Diablo Predator
3.55 Rear Axle
Steeda UDP
Fusion Key

cereb6

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]

Stepman

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

grogan

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.

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2003 convertible gt
stock- 14.31 @ 96.71
current 13.75 @ 106 with wheels spining the entire 1/4 and blown head gasket

v2 vortech polished 10psi supercharger
4.10s
stock bottom end
completely redone top end minus heads and cams

TripleHmotosports

Check for a vacuum leak.

cereb6

Thanks bro.

cereb6

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

cereb6

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.

ExtrmZ

where did you get your code reader? and how does it work?

can you do it yourself?

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"88 LX Hatchback 2.3L



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