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P1637 Diagnostic Trouble Code Discussion for June 2009

Generator 'L' Terminal Circuit Malfunction

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Trouble Ticket Help Requests for DTC P1637
Help Request Posted
2001 BMW 540i 4.4L Poor Idle Quality, Surge, MIL Lamp on, no power VIN: WBADN63431
P1637: throttle valve position controlcontrol deviation. Vehicle starts right up and immediately goes into fail safe drive mode, 2000 RPM max. Have tried clearing code, cleaning, and many different relearn procedures but problem still there. No pinout or wire values on All Data. Can anyone help with diognosis of thr...
June 16, 2009