C7 S6 High Idle with Code P0507

[madfella]

Sorry, it is such a shame when a bad dealer cannot properly diagnose their own product. It makes you mad, makes the community and the brand suffer and no one benefits. I mean the info I am giving you is directly from their own service manuals. At a minimum they could have done those steps for you and came back with either you need a TB or an ECM and here is what it would cost to replace either. And then warranty that work for a year and if the problem comes back it should be covered under that 1 year warranty. Just sucks. I feel that things like this don't happen in Germany...they figure it out no matter what. Maybe I am wrong I don't read the German forums. :)

Another thing I just thought of would be maybe to clear the codes yourself, then maybe disconnect the battery for a while, reconnect, clear codes again then allow it to re-adapt for a while/set readiness or wait for the code to re-appear. It's a long shot but gives you something else to try at least.
Also I'm sure there are other things/measuring blocks you could look at in VCDS that might help further diagnose...ie throttle positions, voltages etc when idle is high, but I am not sure what you would need to look at or what specific values they should be.
Good luck, hopefully you figure it out without needing to replace the ECM as that seems drastic.

I have tried clearing the codes a few times. I may try disconnecting the battery next. I still need to test the voltage at the TB. I’m hoping and praying it’s the TB or the idle control module. Thank you!


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[gk1]

I have tried clearing the codes a few times. I may try disconnecting the battery next. I still need to test the voltage at the TB. I’m hoping and praying it’s the TB or the idle control module. Thank you!


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FWIW the idle control motor is included within the electronics on the TB (right hand side facing motor) It all is one part and is the reason for suggesting if you can find one used it might be worth the swap to see what happens. Even if you can find a place that would let you "borrow" one or has a very good return policy. (long shot)

[madfella]

FWIW the idle control motor is included within the electronics on the TB (right hand side facing motor) It all is one part and is the reason for suggesting if you can find one used it might be worth the swap to see what happens. Even if you can find a place that would let you "borrow" one or has a very good return policy. (long shot)

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