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C134C01 — Additional volume valve 2, rear left - electrical fault

Additional volume valve 2, rear left - electrical fault. 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 C134C01

Porsche Taycan

Chassis Control

Porsche 911 (992)

Chassis Control

Porsche Panamera (971, 2017–2023)

Chassis Control

Porsche Panamera (972, 2024–)

Chassis Control

Porsche Cayenne (9YA)

Chassis Control

How to read and clear C134C01

  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 C134C01 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 Chassis Control

C134B11Additional volume valve 2, front right - short circuit to ground
C134B12Additional volume valve 2, front right - short circuit to B+
C134B13Additional volume valve 2, front right - open circuit
C134B1DAdditional volume valve 2, front right – current implausible
C134BF0Additional volume valve 2, front right - fault
C134BF1Additional volume valve 2, front right - function restriction
C134C11Additional volume valve 2, rear left - short circuit to ground
C134C12Additional volume valve 2, rear left - short circuit to B+
C134C13Additional volume valve 2, rear left - open circuit
C134C1DAdditional volume valve 2, rear left – current implausible
C134CF0Additional volume valve 2, rear left - fault
C134CF1Additional volume valve 2, rear left - function restriction

All 407 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.