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  1. mental!st

    mental!st New Member

    Messages:
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    Location:
    Herts
    Hello to all.....

    I've been reading these forums for a few days and have seen a few posts regarding the P1122 error..

    I originally googled error code and found this forum...

    As a result, I'm still unsure to whether the issue is to due with the throttle body or to do with the pedals as there are various comments through out the forums..

    What I've done so far..... pressed brake and accel pedal and gone to 'key position 2' and read flashes .... 1 1 2 2.

    I've taken car to garage and showed him what I did, he reset the code and a day later it came back on .... so there is a fault..

    My car is an 04 plate, so not sure on MK .... (possibly a 5) I've been quoted £281 because the engine is a 'MEP' (or something like that) for a new throttle body (plus VaT and fitting) is there anything I can check, to make sure it is what I'm being told ?

    On another note if it is electrical, can it be fixed ? Without paying lots of money ?

    I work for an electronics company and we can fault find and repair most things to do with electronics.... but not knowing what is what and where to look I'm a bit confuddled :think

    Thanks for reading
  2. drdre20013

    drdre20013 Member

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    Location:
    Swindon, United Kingdom
    Hi and welcome to the forum, The code comes back as accelerator position sensor - circuit fault, The sensor is just above the accelerator pedal.
  3. vxr-jim

    vxr-jim New Member

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    Location:
    lanark
    :oops: we had a meriva in last week with this fault and it was the dreaded ecu :(
  4. mental!st

    mental!st New Member

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    hmmm Thanks for feedback / advice.. ;)

    My garage has ordered the throttle body so lets hope its that...

    I'll have a look at the bit above accelerator tomorrow put a meter across it :rolleyes:

    If it's the ECU then.... hmmm we'll see. :cry:
  5. leemack

    leemack Active Member

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    Location:
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    If its the accelerator pedal position sensor then that's a completely different part to the throttle body and would normally show up as a throttle body/motor error code.

    I think they have 2 power supplies to pedal (5 volts) but i think one of them breaks down so you loop the other one into it and this will turn the light off.

    I think the fault does relate to an ecu breakdown but couldn't be 100%
  6. mental!st

    mental!st New Member

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    What would be the damage on an ECU ?

    I've already had to sell a kidney to cover the throttle body costs :ROFLMAO:

    I did forget to mention that car goes into limp mode, once car is at operating temperature (approx 10-15mins) This is not always consistant though....

    Sometimes turning of engine and restarting 10 - 15 seconds later and it appears to be ok, a fully responsive car.
  7. drdre20013

    drdre20013 Member

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    Location:
    Swindon, United Kingdom
  8. mental!st

    mental!st New Member

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    Wow, Thanks.... I'll show this to the garage tomorrow.
  9. mowerchaser

    mowerchaser Member

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    Drives:
    Combo
    Code1120 &1122 came up on my Combo. Remove the pedal from the vehicle and disconnect the cables. Easier said than done, but remove valance from in front of pedals to get to last nut and wiring connector. With the pedal mechanism free there is a series of Phillips type screws on the side. Remove all of these. Gently lift of the side plate. Underneath is a pair of double contacts. On the removed piece you can see where these slide making the electrical circuit. Now VERY gently bend the double contacts upwards about 2 -3 mm. Re-attach the the removed side plate. You should be able to feel the side plate springing up. This is the double contacts pressing much harder on the side plate contacts than before. Ensuring that it all stays correctly aligned refasten all the Phillips screws. Put the pedal assembly back in the car . Vigorously pump the pedal several times to bed in the raised contacts. Try to start the engine. I had to do the two pedal test a couple of time before mine worked properly. Perhaps the ecu needed to reset or the contacts weren't working strait away. But they are now. Loads of cash n time saved. Thanks to all who pointed me to the actual problem. Hope this helps others.
    stevek28 likes this.
  10. Gwynethmon

    Gwynethmon Member

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    Location:
    penygroes, caernarfon
    Drives:
    astra eco mk4 diesel 02 plate
    Hi, is it possible to do this on a astra y1.7dti.02 plate,?? Please say yes please say yes, as I'm not convinced that my ECU is the prob, thanx

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