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U000100 — CAN bus – no communication
CAN bus – no communication. The 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 U000100
How to read and clear U000100
- 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 U000100 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 Engine Control Module 1
| P2B3100 | Left radiator fan (RF3) – performance too low |
| P2B6400 | Additional coolant pump (P5) – temperature too high |
| P2B6500 | Additional coolant pump (P5) – dry run |
| P304000 | Transmission position implausible |
| P305200 | Terminal 50, feedback line - short circuit to B+ |
| P305300 | Terminal 50, feedback line - short circuit to ground/open circuit |
| U002800 | Hybrid CAN bus – faulty |
| U002900 | Hybrid CAN bus - no communication |
| U008000 | FlexRay data bus - synchronization |
| U009200 | LIN bus 1 – electrical fault |
| U009300 | LIN bus 1 – no communication |
| U010000 | Engine electronics (DME) control unit – no communication |
All 221 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.