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P1131 Diagnostic Trouble Code Discussion for June 2004

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 Taurus GL 3.0L MIL Lamp on VIN: 1FALP52U0T
P1131: HO2S11 snsr indicates lean. ... codes were in the system memory, the P1131 and P1151 reset as soon as you run the code tests again. The fuel pressure is good and doesn't drop when driving, the MAF was only slightly dirty and cleaning didn't make any differ...
June 10, 2004
1995 Ford Thunderbird LX 4.6L MIL Lamp on VIN: 1FALP62WXS
P1131: HO2S1B1 Lean limit. This car was running poorly with P1131 and P0171 codes. LTFT indicated lean condition. Cleaned debris from MAF and runs fine now. After two days MIL back on... same codes. Scoped the bank1 sensor and see no difference between it and bank 2 sensor. Smoke tested...
June 21, 2004
1997 Ford E-150 Econoline 4.6L Hesitation, MIL Lamp on VIN: 1FDEE1463V
P1131: Enhanced DTC. ... codes #P1131 and #P1152 it also had pending codes of Po133 o2 sensor ckt. slow response (bank 1-sensor-1) and Po153 o2 sensor ckt. slow response(bank-2 sensor-2). Customer says it has normal idle within the first 15 minu...
June 25, 2004