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P1157 Diagnostic Trouble Code Discussion for November 2010

Air Fuel Sensor (Bank 1 Sensor 1) AFS Line High Voltage

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Trouble Ticket Help Requests for DTC P1157
Help Request Posted
1999 Ford F-150 5.4L Poor Idle Quality, Surge, Stall VIN: 1FTRF17Z5X
P1157: Indicates o2 sensor b2s2 lean. ... told him he needed a mass airflow sensor for a P0171 lean code he had. He said he replaced the mass airflow sensor and relized it made no real difference and brought it to me. There is no codes pending or present at this time and the engine is idling rough...
November 29, 2010