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No Response from Accelerator and in Limp Mode (Car with Spanner light on)

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  • [Corsa D 2006-2014] No Response from Accelerator and in Limp Mode (Car with Spanner light on)


  • #2
    Hi welcome to the forum.

    Sorry but ecu's and fault codes are well outside my comfort zone. But I seem to recall that electronic throttles have some sort of sensor connected to the throttle pedal in the car that communicates electronically with an actuator at the engine end (throttle body,fuel injection or whatever. )

    If the two are out of synch there could be a number potential candidates ,sensors (probably more than on) , or even simple mechanical thing such as a return spring has gone twang. (if they still have such things).

    Replacing sensors in the hope of a cure could get quite expensive. It could work out cheaper in the long run if you could find a decent independent garage, preferably a vauxhall specialist.

    But if you can wait a bit longer someone else might be able suggest something else you could try.

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    • #3
      Thanks for welcome bugman

      I have replaced the whole accelerator assembley (pedal, senor, etc) as that's how it comes from Vauxhall.

      I am thinking possibly an ECU issue.

      Not used to cars of today with all the electronics, give me a classic with good old machanical parts and I am fine

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      • #4

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        • #5
          I have just changed the pedal with sensor not the throttle body.

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          • #6
            It's probably going to be the throttle body then .check the wire connection on the throttle body, if that looks ok I'd try a second hand throttle body from a scrapy or ebay .if you do fit a second hand one ,before you start the car disconnect the battery then reconnect, start the car on the key without touching the throttle and leave it ticking over for a few minutes for the ECU to relearn the position of the throttle. You could get it scanned with op-com , but all it will probably say is no communication between pedal and throttle body which you already know.

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            • #7
              Cheers Restorer, will give that a try

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              • #8
                Just a thought before you change the throttle body. The car could be still stuck in limp mode after you changed the pedal. Just try the disconnect, reconnect on the battery, if you haven't got a scanner that will take it out of limp mode .and start the car the same as I told you for the throttle body. Best of luck

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                • #9
                  Wow, that seems to of did the trick. All appears ok, will see what happens over the next few days

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                  • #10
                    Glad you got it fixed. 👍

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                    • #11
                      Well I have covered approx 50 miles with no issues then today it came back. No Revs & warning lihght on!!!!!

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                      • #12
                        The only thing I can suggest now is try swapping the throttle body with a second hand one. And do the disconnect on the battery . After that is going to be a wiring or ECU problem.

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                        • #13
                          Ordered a replacement throttle body, should hopefully be here Saturday or Monday.

                          Funny thing, just reset everything again and the fault has gone again. Could it be the ECU?

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                          • #14
                            It's probably not going to be the wiring then . Yea I'd say throttle body or ECU . Sounds like the signal keeps dropping off, and when you do the relearn with the battery it reconnects .
                            Good luck.

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                            • #15
                              Well I am still having problems. I have replaced the accelerator pedal & the throttle body, I even replaced the battery as I read somewhere that a dodgy battery could affect the ECU.

                              The current problem is P2121 which is APP 1 & 2 signal ratio. I have managed to get it on Vaux-com diagnosis machine and watched the APP senors output and when I press the pedal sensor one goes from 1.02 V up to 3.96V but senor 2 goes from 0.66v to 1.99v. Not sure if thats correct or not.

                              The car currently drives but the fault light is on, which is an improvement over no revs.

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