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U14C000 — Subgateway as firewall control module, no communication
Subgateway as firewall control module, no communication. 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 U14C000
How to read and clear U14C000
- 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 U14C000 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 Gateway
| U14B100 | Ethernet databus branch 9, Short circuit |
| U14B200 | Ethernet databus branch 10, Short circuit |
| U14B300 | Ethernet databus branch 11, Short circuit |
| U14B400 | Clock synchronization master, branch 9, invalid number |
| U14B500 | Clock synchronization master, branch 10, invalid number |
| U14B600 | Clock synchronization master, branch 11, invalid number |
| U14C600 | Battery charger 2 for high voltage battery, no communication |
| U151D00 | High Voltage Converter control module, no communication |
| U151E00 | High Voltage Converter control module 2, no communication |
| U152200 | High-voltage charger, Plug and Charge function – communication from backend implausible |
| U152300 | Plug and Charge, Certificate update failed |
| U154200 | Instrument cluster - no communication |
All 374 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.