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P1138 Diagnostic Trouble Code Discussion for November 2011

Heated Oxygen Sensor (Bank 1 Sensor 2) Circuit High Voltage During Decel Fuel Cutoff

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Trouble Ticket Help Requests for DTC P1138
Help Request Posted
2000 Lincoln LS 3.9L Poor Idle Quality, Surge VIN: 1LNHM87A5Y
P1138: ho2s12 indicates rich. after all coils were replaced car was fine was driven 240 miles came back in with surging idle and fueltrim -25 both banks. noticed that bank 1 will not switch unless we disconnected two injectors on bank 1. if we feels like another bad injector but I was wond...
November 21, 2011