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C10F313 — Bulb for brake lamp on trailer, Open circuit

Bulb for brake lamp on trailer, Open circuit. The Taycan, 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 C10F313

Porsche Taycan

Trailer Function

Porsche Panamera (971, 2017–2023)

AAG (Anhaenger)

Porsche Panamera (972, 2024–)

AAG (Anhaenger)

Porsche Cayenne (9YA)

AAG (Anhaenger)

How to read and clear C10F313

  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 C10F313 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 Trailer Function

C10E713Lock bolt contact switch, Open circuit
C10E729Lock bolt contact switch, Implausible signal
C10E813Trailer socket, Open circuit
C10E901Pin 10 outlet voltage supply, Electrical error
C10EA01Pin 9 outlet voltage supply, Electrical error
C10F311Lamp for brake light on trailer - short circuit to ground
C10F315Lamp for brake light on trailer - open circuit/short circuit to B+
C10F411Lamp for right tail light on trailer - short circuit to ground
C10F415Lamp for right tail light on trailer - open circuit/short circuit to B+
C10F511Lamp for left tail light on trailer - short circuit to ground
C10F515Lamp for left tail light on trailer - open circuit/short circuit to B+
C10F611Lamp for right direction indicator on trailer - short circuit to ground

All 112 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.