Home › Fault codes › U178800

U178800 — Front axle power electronics control unit – drive fault

Front axle power electronics control unit – drive fault. The Taycan report this code; below is which control unit sets it on each model and how to read and clear it.

Which models and control units set U178800

Porsche Taycan

Engine Control Module 1

How to read and clear U178800

  1. Plug a standard ENET (Ethernet-to-OBD) cable into your Porsche's OBD port and your Mac or Windows PC.
  2. Open STEUER14, pick your car and run a fault scan: every control unit is read, and U178800 shows with its status, its full description and the freeze frame when the unit stores one.
  3. Fix the cause first, then clear the fault memory and scan again to check it stays away. Reading and clearing fault codes is free on every control unit.

More about fault memory in the manual →

Download STEUER14 — free fault reading

Other codes of the Engine Control Module 1

U144600Brake electronics control module 2, no communication
U145700Control unit for driver assistance systems - signal implausible
U147200Servo motor (clutches) – implausible CAN message received
U149B00Remote multifunction module, no communication
U14BF00CAN bus, Electrical malfunction
U178700Rear axle power electronics control unit – drive fault
U178900Rear axle power electronics control unit – only freewheel possible
U178A00Control unit for front axle power electronics – only freewheel possible
U178B00Rear axle power electronics control unit, freewheel fault in drive above freewheel speed threshold
U178C00Front axle power electronics control unit, freewheel fault in drive above freewheel speed threshold
U178D00Rear axle power electronics control unit – power reduction
U178E00Front axle power electronics control unit – power reduction

All 274 codes of this control unit →

Fault names come from the manufacturer's diagnostic data. STEUER14 is independent and not affiliated with Porsche AG. A code tells you what a control unit detected, not always which part failed — check wiring, supply voltage and related codes before replacing parts. STEUER14 shows each fault's full description, status and freeze frame on the car.