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C135DF0 — Power steering control module, Insufficient steering assistance detected
Power steering control module, Insufficient steering assistance detected. 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 C135DF0
How to read and clear C135DF0
- 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 C135DF0 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 Steering Assist
| C12ABF1 | Rear radar, left – faulty |
| C12ABF2 | Rear radar, right – faulty |
| C12ABF3 | Front corner radar, left – faulty |
| C12D3F0 | Driver assistance, regulatory requirement, rejected |
| C12EF00 | New installation detected |
| C12F000 | Steering assistance failed while in use |
| C135DF1 | Steuergerät für Servolenkung, setzt Anforderung nicht um |
| C13EC22 | Steering system friction, above upper limit |
| C13EDF0 | Driver activity detection, inactive |
| P060F00 | Internal Control Module Coolant Temperature Performance |
| U101100 | Supply voltage – too low |
| U101200 | Supply voltage – too high |
All 133 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.