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C139401 — Safety valve – electrical short circuit
Safety valve – electrical short circuit. 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 C139401
How to read and clear C139401
- Plug a standard ENET (Ethernet-to-OBD) cable into your Porsche's OBD port and your Mac or Windows PC.
- Open STEUER14, pick your car and run a fault scan: every control unit is read, and C139401 shows with its status, its full description and the freeze frame when the unit stores one.
- 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 readingOther codes of the Chassis Control
| C138F01 | Battery, suction throttle valve – electrical short circuit |
| C138F07 | PDCC system restriction |
| C139001 | Proportional valve 1 – electrical short circuit |
| C139101 | Proportional valve 2 – electrical short circuit |
| C139201 | Direction valve 1 – electrical short circuit |
| C139301 | Direction valve 2 – electrical short circuit |
| C139601 | Sensor – short circuit |
| C13B6F3 | Damping adjustment valve, front left, pressure, current implausible |
| C13B6F4 | Damping adjustment valve, front right, pressure, current implausible |
| C13B6F5 | Damping adjustment valve, rear left, pressure, current implausible |
| C13B6F6 | Damping adjustment valve, rear right, pressure, current implausible |
| C13B6F7 | Damping adjustment valve, front left, traction, current implausible |
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.