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C138B01 — Communication error
Communication error. 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 C138B01
How to read and clear C138B01
- 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 C138B01 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
| C1386F1 | Front axle tire temperature display, implausible signal |
| C1386F2 | Tire temperature display, functional impairment |
| C1387F0 | FL body acceleration sensor installed incorrectly |
| C1388F0 | FR body acceleration sensor installed incorrectly |
| C1389F0 | RL body acceleration sensor installed incorrectly |
| C138AF0 | RR body acceleration sensor installed incorrectly |
| C138BF0 | Pressure sensor – below working range |
| C138BF1 | Pressure sensor – above working range |
| C138CF0 | Temperature sensor – above working range |
| C138CF1 | Temperature sensor – below working range |
| C138EF0 | PDCC system restriction |
| C138EF1 | PDCC system 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.