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B18C204 — External sound amplifier, Malfunction
External sound amplifier, Malfunction. 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 B18C204
How to read and clear B18C204
- 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 B18C204 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
| B18B811 | Mobile communications antenna 3 for informations electronics 1, Short circuit to ground |
| B18B812 | Mobile communications antenna 3 for informations electronics 1, Short circuit to B+ |
| B18B813 | Mobile communications antenna 3 for informations electronics 1, Open circuit |
| B18B911 | Mobile communications antenna 4 for informations electronics 1, Short circuit to ground |
| B18B912 | Mobile communications antenna 4 for informations electronics 1, Short circuit to B+ |
| B18B913 | Mobile communications antenna 4 for informations electronics 1, Open circuit |
| B18C2F0 | External sound amplifier, Function restriction due to overheating |
| B18C2F1 | External sound amplifier, Fan faulty |
| B18C8F1 | HDCP authentication error: display device certificate |
| B18C8F3 | HDCP authentication error: display device certificate |
| B18C8F4 | HDCP authentication error: display device certificate |
| B18C8F5 | HDCP authentication error to center display LVDS interface |
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.