Hi guys,
Looking for help with P1639/18048. Have had the problem since I got the car three years ago. Previous owner had same issue.
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It’s intermittent and generally clears itself and all is good. EPC and traction lights are lit on the dash when error is on a runs on limp mode. It seems to be happening more lately.
I’ve search the forum and the only reference I can find is wet ECU box.
Error happens with stock tune, JHM tune or Jackal tune.
Car is B7 S4 Avant 6MT swapped. Problem was already there when it was Tip.
What’s been done. Mostly by previous owner.
ECU swapped.
-JHM ECU with 91 & stock tune
-Jackal tune (different ECU from above)
Accelerator pedal swapped
Throttle body swapped.
Audi dealer rewired accelerator directly to ECU.
Cleaned MAF
O2 sensors replaced
check ECU box/connectors - dry
Appreciate any input from anyone.
Engine is healthy otherwise with recent timing chain & other service done. Really enjoy driving the car when it’s not in limp mode.
Jerome
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