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P1235 Diagnostic Trouble Code Discussion for December 2010

High Pressure Fuel Pump Circuit Malfunction

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Trouble Ticket Help Requests for DTC P1235
Help Request Posted
2005 Ford Focus ZX4 2.0L Loses power VIN: 1FADFP34N5
P1235: Fuel pump control. I had the scope hooked to the fuel pump control FPDM. Back probed the circuits to pcm pins 1 & 7 and the circuit to the pump pin 10 and had a fuel presssure gauge attached to windshield. Every thing was fine for a few miles then I started to hear a clickin...
December 01, 2010