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B1790 Diagnostic Trouble Code Discussion for July 2006

Autolamp sensor input circuit failure

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Trouble Ticket Help Requests for DTC B1790
Help Request Posted
2001 Ford Taurus SE 4-Valve 3.0L Poor Idle Quality, Surge, MIL Lamp on VIN: 1FAHP56S91
B1790: Autolamp sensor input circuit failure. I went to a Ford dealer to try an IAC valve, which it took about half an hour for them to find for their own vehicle. then I installed it, and behold, it ran worse than it did with the original IAC valve in it. SO, does anyone out there know what in Hades the...
July 14, 2006