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?
Dec 4, 2010 at 12:50 PM
Check engine light - code: p1131
ASHLEYD01
- MEMBER
- 2 POSTS
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.
It can also be caused by low fuel pressure or a plugged injector.
Dec 4, 2010 at 12:53 PM
How do I fix this?
Dec 4, 2010 at 2:20 PM
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