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D2 - Transmission Gearboxes, diffs, drive shafts.

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  #1  
Old 10th August 2021, 04:37 PM
Simon Wallwork Simon Wallwork is offline
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Default P0758

This is a continuation of my 'red lights come on' thread.

Finally got the fault code and it is "P0758 Shifter Solenoid B: Electrical"

We have problems here in Bulgaria with Pine Martens nibbling wires. Is this possible in this case?

Could low ATF levels cause this?
Still a bit baffled by this, but car is doing it 100% of the time now!

Last edited by Simon Wallwork; 10th August 2021 at 07:33 PM.
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Old 10th August 2021, 05:44 PM
MikkiJayne MikkiJayne is offline
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Thats either a TCU hardware fault per the discussion in the other thread, or a wiring issue (nibbled or corroded). I've seen it several times now and its never been an actual solenoid problem - its always something outside the gearbox. ATF can't cause those sorts of faults.
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Old 10th August 2021, 07:32 PM
Simon Wallwork Simon Wallwork is offline
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Thanks MikkiJayne. I shall investigate further.
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Old 10th August 2021, 07:48 PM
Simon Wallwork Simon Wallwork is offline
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I should add that after the very competent guy drove the car, with his OBD attached he said "no pressure".
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Old 12th August 2021, 02:47 PM
Simon Wallwork Simon Wallwork is offline
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I've had a look under the car, and there's no sign of damaged wiring.

Does anybody- MikkiJayne possibly??- have a TCU they could sell me?

4D0 927 156 BN is the number on the case.
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Old 12th August 2021, 07:32 PM
Snaggle57 Snaggle57 is offline
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Quote:
Originally Posted by Simon Wallwork View Post
I've had a look under the car, and there's no sign of damaged wiring.

Does anybody- MikkiJayne possibly??- have a TCU they could sell me?

4D0 927 156 BN is the number on the case.
I have one that came from a8parts when I thought mine was faulty but it wasnít.
However itís from a PF car and I think the code ends in BG but not certain.
If this would work on your car let me know and Iíll dig it out and check
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  #7  
Old 12th August 2021, 07:44 PM
MikkiJayne MikkiJayne is offline
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PF won't work in an FL as it doesn't have canbus.
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Old 13th August 2021, 01:12 PM
Simon Wallwork Simon Wallwork is offline
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MikkiJayne
Your friend in Germany has one, and he has sold it to me.
Many thanks!
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Old 13th August 2021, 01:18 PM
MikkiJayne MikkiJayne is offline
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Good stuff
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  #10  
Old 23rd August 2021, 11:44 AM
Simon Wallwork Simon Wallwork is offline
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MikkiJaynes' chum Petros sent me a replacement TCU, which has fixed the car.

I certainly recommend Petros, as a good alternative source if Prestige can't help- for me, living in the EU, importing anything worth more than 50 Euro attracts the full attention of customs, so it's sometimes easier dealing within the EU.

Price wise, the TCU can be repaired for 350 Euro, a new one is very expensive circa 1200 Euro.

Petros charged me 110 Euro delivered- and it works.

Excellent service!

Thanks Petros & MikkiJayne.
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