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C11EB04 — Brake booster pressure sensor 2, Faulty
Brake booster pressure sensor 2, Faulty. 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 C11EB04
How to read and clear C11EB04
- 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 C11EB04 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 Brake Electronics
| C11DB00 | Right front wheel circumference implausible |
| C11DC00 | Left rear wheel circumference implausible |
| C11DD00 | Right rear wheel circumference implausible |
| C11EA12 | Roof rack detection sensor - short circuit to B+ |
| C11EA14 | Roof rack detection sensor - open circuit/short circuit to ground |
| C11EA29 | Sensor for roof rack recognition, Implausible signal |
| C11EC04 | Brake booster pressure sensor, Faulty |
| C11EDF0 | Holding function, unexpected values from ctrl. module for distance control |
| C11EDF1 | Holding function, unexpected values from ctrl. mod. for pwr. sup. sys. |
| C11EDF2 | Holding function, unexpected values from transm. |
| C11EDF3 | Holding function, unexpected values from HV battery charging unit |
| C11EDF4 | Holding function, unexpected values from brake booster |
All 317 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.