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www.ask.com/youtube?q=What+Is+Code+P1131+On+A+Ford+Expedition&v=4NA98PsyKGg
Apr 3, 2014 ... How to diagnose, interpret and fix a vehicle displaying code P1131 using ... O2 sensor, and Jeff shows you where to look on a Ford Escape I4.

www.engine-codes.com/p1131_ford.html

Possible Causes and Repair Information for P1131 Ford code. Learn what does P1131 Ford means? P1131 Ford Lack of Upstream Heated Oxygen Sensor ...

www.ford-trucks.com/forums/151777-error-code-p1131.html

Sep 11, 2003 ... Error Code P1131 1997-2006 Expedition & Navigator.

itstillruns.com/ford-code-p1131-7713313.html

Trouble code P1131 means that the powertrain control module has detected a lean condition for engine bank No.1. Code P1131 can be caused by a vacuum ...

www.ericthecarguy.com/obd-code-lookup/23-obd-codes/obd-ii-codes/239-p1131-oxygen-sensor-1-bank-1-ford

This is a manufacture wide OBD II trouble code list (Years 96-current). This list gives you the P series of codes.

www.fordf150.net/forums/viewtopic.php?t=51788

My check engine light was on so I took it to AutoZone. They hooked up the computer and it gave me these two codes. Any idea where I could ...

www.answers.com/Q/What_is_code_P1131_on_a_Ford_Expedition

P1131 on an Expedition is a mass air metering error, not to be confused with a mass air sensor. The engine control module cannot see the bank one.

www.fixya.com/cars/t3376430-engine_trouble_codes_p1151_p1131

If both, P1131 and P1151 trouble codes are set at the same time, the .... Ford says not to (they'd rather sell new part) but it will work at least long ...

www.obd-codes.com/p1151-ford

This particular DTC article refers to a P1151 trouble code on Ford vehicles. This does not apply to .... P1131,P1151,P0174, P0304, P0306 2000 Ford Expedition