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U14FE00 — Secure Onboard Communication, Signature inspection failed
Secure Onboard Communication, Signature inspection failed. 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 U14FE00
How to read and clear U14FE00
- 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 U14FE00 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 Information Control Unit
| U144300 | Internal sound amplifier, Function restriction due to excessive voltage |
| U144400 | Internal sound amplifier, Function restriction due to low voltage |
| U146400 | Passenger display - no communication |
| U147300 | External sound amplifier, no communication |
| U147400 | External sound amplifier, invalid protocol version |
| U14FD00 | Secure Onboard Communication, Time server not available |
| U14FF00 | Secure Onboard Communication, Signature creation failed |
| U151300 | Secure Onboard Communication, Key not available |
| U154000 | Ethernet databus, missing message from emergency call module |
| U156C00 | Ethernet databus, Missing message from diagnostic interface for data bus |
| U15A700 | External GPS source, Missing message |
| U15A800 | External GPS source, Received malfunction value |
All 614 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.