Mechanics

CHECK ENGINE LIGHT - CODE: P1131

1999 Mercury Cougar • 6 cylinder FWD Automatic • 95,700 miles

My 1999 Mercury Cougar has the CE light on and the code read p1131. I can't afford to take it in to a shop right now, so what do I do to fix this?
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Ashleyd01
December 4, 2010.




DTC P1131 indicates the system is correcting RICH for an overly LEAN condition. The Heated Oxygen Sensor (HO2S) voltage is less than 0.45 volts. This is usually due to a vacuum leak after the MAF. It can also be caused by a bad PCV valve or PCV system hose.

It can also be caused by low fuel pressure or a plugged injector.
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Tiny
Rasmataz
Dec 4, 2010.
How do I fix this?

Tiny
Ashleyd01
Dec 4, 2010.

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