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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 leak, fuel injector problem, ignition problem or by a faulty oxygen sensor.
P 1131 Oxygen sensor bank 1 sensor 1 lack of switching, You can have a vauum leak causing this sensor to read lean or the sensor went out and doesnt switch
Code p1131 manufacturer control fuel air metering, on a 2003 Ford Taurus. Where is part? Is there an easy way to see if it can be fixed without buying the expensive part?
replace the O2 sensor in bank 1 sensor 1, this is the sensor before the catalytic converter, bank one is the exhaust pipe comimg from the cylinder head that has cylinder # 1 in it.
what type of cyl. problem, compression ,miss fire, if it is a comp. issue more than likely you have a nead gasket problem,you can check this by performing a cyl.compression test you can purchase the tool the other two issuses are simplely fixed by replacing those sensors this could very well elimate the other problem
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