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P1131 Diagnostic Trouble Code Discussion for April 2006

Heated Oxygen Sensor (Bank 1 Sensor 1) Indicates A/F Ratio Too Lean


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Trouble Ticket Help Requests for DTC P1131
Help Request Posted
1996 Ford Mustang 3.8L Excessive Emissions, Poor Idle Quality, MIL Lamp on VIN: 1FALP4044T
P1131: Lack of Ho2s B1 S1 sw indicates lean. This vehicle runs bad when its cold and has no power,when the engine warms up it runs ok.My concern is that the computer always reads 253 degrees for the ect sensor and is 0.00 volts (Even when cold)and fan stays on.When the connector is disconnected from ect ...
April 01, 2006
1996 Ford Mustang 3.8L Excessive Emissions, Poor Idle Quality, MIL Lamp on VIN: 1FALP4044T
P1131: Lack of Ho2s B1 S1 sw indicates lean. This vehicle runs bad when its cold and has no power,when the engine warms up it runs ok.My concern is that the computer always reads 253 degrees for the ect sensor and is 0.00 volts (Even when cold)and fan stays on.When the connector is disconnected from ect ...
April 11, 2006
1996 Lincoln Continental Anniversary 4.6L MIL Lamp on VIN: 1LNCLM97V5
P1131: mnf specif code sensor lean. hello ford friends, this vehicle is showing lean fuel condition. LT. fuel trim is 23% bank 1 24% bank 2. checked for vacuum leaks, pcv hoses, air boot intake etc. no troubles found, engine runs very good, no rough idle, no pinging, no hesitation on accel etc. ...
April 18, 2006
1995 Ford Windstar GL 3.8L MIL Lamp on, Low power VIN: 2FMDA5141S
P1131: O2 sensor indicates lean condition bank 1. This car has the MIL light on with all of the codes listed above. We cleared the codes and within 1 hour of driving the light was back on with codes 1131 and 1151 indicating a lean condition in both banks. We double checked fuel pressure and smoke tested the i...
April 21, 2006
1995 Ford Windstar GL 3.8L MIL Lamp on, Low power VIN: 2FMDA5141S
P1131: O2 sensor indicates lean condition bank 1. This car has the MIL light on with all of the codes listed above. We cleared the codes and within 1 hour of driving the light was back on with codes 1131 and 1151 indicating a lean condition in both banks. We double checked fuel pressure and smoke tested the i...
April 24, 2006