Home › Fault codes › B17B604
B17B604 — Roof electronics control module 2 (ambient lighting), faulty
Roof electronics control module 2 (ambient lighting), faulty. 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 B17B604
How to read and clear B17B604
- 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 B17B604 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 Central Electrics
| B17B004 | Center console contour illumination lamp 8, faulty |
| B17B104 | Left front seat contour illumination lamp 1, faulty |
| B17B204 | Left front seat contour illumination lamp 2, faulty |
| B17B304 | Right front seat contour illumination lamp 1, faulty |
| B17B404 | Right front seat contour illumination lamp 2, faulty |
| B17B504 | Roof electronics control module (ambient lighting), faulty |
| B17DD11 | Ionizer electrode needle 2, Short circuit to Ground (GND) |
| B17DD13 | Ionizer electrode needle 2, Open circuit |
| B17E704 | Left rear door ambient lighting bulb 2, faulty |
| B17E804 | Right rear door ambient lighting bulb 2, faulty |
| B17F129 | Engine noise selection button, Implausible signal |
| B17F311 | Rear window shade button 2, Short circuit to Ground (GND) |
All 1472 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.