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Thread: Fault Code P0120 -Throttle Pedal Position Sensor/Switch A Circuit Malfunction?

  
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    Fault Code P0120 -Throttle Pedal Position Sensor/Switch A Circuit Malfunction?

    Hi,

    Did the pedal test tonight and came up with the above? Whats broken - it doesnt make much sense to me

    I have a Z18XE with the 'drive by wire' throttle potentiometer outfit.

    Can anyone help?
    I>< Silver Coupe ><I

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    9 times out of 10 it is down to the failing electronic position sensor within the throttle body or sometimes the peddle itself, but that one time it can just be a glitch. so disconnect battery for a while to clear the code and see if it pops up again, if it does then you know where to look

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    Cheers Steve - if the sensor is nackered - will I need a new throttle body?
    I>< Silver Coupe ><I

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    possibly yes, but check over the pedal first. but i have found from experience that the fault still persists after fitting a new pedal. the Z18 between year 2000 to 2002 had quite a few throttle body faults. the new revised throttle body normally cures this. it has to be fitted via tech 2 upload as well in order to set the positioning and idle correctly. you might be best buying the throttle body from an independant trader and getting a garage with tech 2 access to fit it for you, as vauxhall will want both your kidneys for this job

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    Mines a 2003 model so will it have the updated throttle body?
    I>< Silver Coupe ><I

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    possible mate, it all depends on the exact build time and the specific parts they used on the production line at that time. try and reset the ECU first and see if the code returns before splashing the cash

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    Someone kindly gave me a full wiring diagram last night of the throttle potentiometer system and how to deal with the 120 code, I s know where to look for the sensor. If anyone wants a copy let me know.
    I>< Silver Coupe ><I

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    hi could you email a copy of wiring diagram its tim2dt@aol.com many thanks

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    Could I also have a copy of the wiring diagram, Im having the same problem, my car decides to rev up on its own!
    shemz39@hotmail.co.uk

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