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U012000 — Starter generator control unit - no communication

Starter generator control unit - no communication. The Taycan, 911 (992), Panamera (971), Panamera (972) 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 U012000

Porsche Taycan

Gateway

Porsche 911 (992)

Engine Control Module 1Gateway

Porsche Panamera (971, 2017–2023)

Engine Control Module 1Gateway

Porsche Panamera (972, 2024–)

Engine Control Module 1Gateway

Porsche Cayenne (9YA)

Engine Control Module 1Gateway

How to read and clear U012000

  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 U012000 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 Gateway

U010E00Reducing agent (SCR) control unit - no communication
U011000High-voltage power electronics control unit - no communication
U011200High-voltage battery control unit – no communication
U011400All-wheel drive electronics control unit (PTM) - no communication
U011500Engine control unit (slave) - no communication
U011600Thermal management control unit - missing message
U012100Brake electronics (PSM) control unit – no communication
U012700Lost Communication With Tire Pressure Monitor Module
U012A00Control unit for chassis control (PASM) – no communication
U013000Power steering control unit - no communication
U013200Control unit for chassis control (PASM) – no communication
U014000Front-end electronics control unit (BCM1) - missing message

All 374 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.