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P168400 — Control module programming, Malfunction in data transfer
Control module programming, Malfunction in data transfer. 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 P168400
How to read and clear P168400
- 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 P168400 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
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| C136BF0 | High-voltage coordinator - function restriction due to high-voltage voltage converter |
| P056000 | Terminal 30 power supply – signal implausible |
| P061000 | Control unit - variant coding invalid |
| P062F00 | Function restriction |
| P0B3700 | High Voltage Service Disconnect Open |
| P16F600 | 48V vehicle electrical system, Electrical malfunction |
| P16F700 | Starter generator, Sequence error during operating mode setting |
| P1B0000 | Generator, Mechanical malfunction |
| P1B0100 | Generator, Electrical error |
| P1B0200 | 12 V battery monitoring - no function |
| P1DA500 | Data bus – fault value received |
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.