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U138B00 — Left rear interior lamp, no communication
Left rear interior lamp, 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 U138B00
How to read and clear U138B00
- 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 U138B00 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
| U138500 | Right front seat contour illumination lamp 2, no communication |
| U138600 | Right front seat contour illumination lamp 2, implausible message |
| U138700 | Roof electronics control module (ambient lighting), no communication |
| U138800 | Roof electronics control module (ambient lighting), implausible message |
| U138900 | Roof electronics control module 2 (ambient lighting), no communication |
| U138A00 | Roof electronics control module 2 (ambient lighting), implausible message |
| U138C00 | Left rear interior lamp, implausible message |
| U138D00 | Right rear interior lamp, no communication |
| U138E00 | Right rear interior lamp, implausible message |
| U13A100 | Left rear door ambient lighting bulb 2, no communication |
| U13A200 | Left rear door ambient lighting bulb 2, implausible message |
| U13A300 | Right rear door ambient lighting bulb 2, no communication |
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.