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Old 06-21-2006, 12:25   #1 (permalink)
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'99 Escort check engine light

I have a 99 Escort and just got a check engine light reading. p1131 - manfacturer controlled fuel and air metering. I have searched this on line and they say, " mass air flow sensor needs replaced" or "O2 senser needs replaced."

I only have 140K miles on this car. Any ideas or suggestion?
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Old 06-21-2006, 20:22   #2 (permalink)
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Re: '99 Escort check engine light

Hope this helps. The code P1131- Lack of HO2S11 Switches- Sensor Indicates Lean
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Old 06-21-2006, 21:22   #3 (permalink)
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Re: '99 Escort check engine light

I would change the O2 sensor. Especially if it has that many miles on it.
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