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P1131 Diagnostic Trouble Code Discussion for April 2005

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
1999 Ford Ranger XL 2.5L Hesitation, Cuts out VIN: IFTYR10C3X
P1131: oxygen sensor lean. This vehicle will start and idle normally. Upon throttle opening the engine will not exceed about 2500 rpm (less under load) It feels like fuel starvation or restricted exhaust. Pressure is good, exhaust is not restricted. MAF is OK. O2 sensor is new and worki...
April 26, 2005