PRNDS flashing gearshift codes

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04-14-2024, 06:43 PM

kakise

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PRNDS flashing gearshift codes

I have an issue on my 2006 A3 3.2 once every 2 weeks where the PRNDS begins flashing and the car will go to neutral. Normally I can just cycle the key switch and the car and continue driving. It is completely random and under various conditions. I have scanned the codes after this happens and every time i get:
P1854 databus drivetrain faulty
p1680 databus drivetrain implausible message from electronic central electric
u0103 cost communication with gear shift module
and sometimes i get:
p1740 clutch temperature monitoring.
I have checked the microswitch on the shifter and also did a fluid change and replaced the clutch temperature sensor/speed sensor. Issue remains. Is there any other checks that are recommended? How do you check the CAN network to ensure the wiring is good to the gear shift or is it common enough for them to fail? I tried searching the forum but i haven’t seen my exact issue on the forum. thanks in advance

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05-04-2024, 06:08 PM

Behic

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You can check ATF temperature.When it reaches high temperatures and cannot provide adequate cooling, it restricts its features and the transmission restricts itself. and transmission fail is flashing prnds