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Thread: p0120 help!!

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    Default p0120 help!!

    hi everybody!I've got a problem with my vectra c 2.0dti hatchback, y20dth engine,engine starts and working in the safe mode only,no response on the throttle,smoking a bit,scan tool has show P0120 Accelerator Pedal Position Sensor 1 High Input,I've checked the pedal on the second car and is 100% working,I have no idea what is wrong,any sugestions welcome..thanks

  2. #2
    Regular Member yysnet's Avatar
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    Check wiring. Doggy plugs, dead wires etc.

    Also use the scan tool to see the dataflow from your ecm, there should be pedal sensor position(voltage).

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    hi,I've checked data flow fom pedal position sensor 1- 4.88V
    pedal pos sensor 2 - 0.49V
    with foot down PPP1 - 4.92V
    PPP2 - 1.84V
    screws on the ecu pump looks like was remowed before.

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