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P136C00 — 48V vehicle electrical system, voltage too high

48V vehicle electrical system, voltage too high. The Taycan, Panamera (971) and Cayenne 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 P136C00

Porsche Taycan

Roll Control System

Porsche Panamera (971, 2017–2023)

eAWS1 (elektrische Aktive Wank Stabilisierung 1)

Porsche Cayenne (9YA)

eAWS1 (elektrische Aktive Wank Stabilisierung 1)

How to read and clear P136C00

  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 P136C00 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 Roll Control System

C141CF0Motor for motor pump unit, left electric machine, sensor defective
C141CF1Motor for motor pump unit, electric machine, phase currents outside the valid values
C141CF2Motor for motor pump unit, electric machine, overcurrent
C141CF3Motor for motor pump unit, left electric machine, overspeed
C141CF4Motor for motor pump unit, right electric machine, sensor defective
C141CF5Motor for motor pump unit, right electric machine, overspeed
P178E00Compressor for level control, Temperature too high
U003800Private CAN bus, no communication
U006400Infotainment CAN bus faulty
U045200Airbag control unit - signal implausible
U101100Supply voltage – too low
U101200Supply voltage – too high

All 81 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.