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P1635 Diagnostic Trouble Code Discussion for February 2014

5-Volt Reference 'A' Circuit Malfunction

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Trouble Ticket Help Requests for DTC P1635
Help Request Posted
2007 Ford Fusion SEL 3.0L MIL Lamp on VIN: 3FAHP02197
P1635: Tire / Axle Ratio Out of Acceptable Range. ... Found the coil fuse blown. Changed the fuse and it blew again when we tried to start the car. Pulled the plenum and found 2 coil packs on the back side was burnt. Replaced all 3 coils on the back side and the plugs, changed the fuse again and blew the fuse...
February 26, 2014