B0125
Driver Side Mirror Position Sensor
The body control module has detected a fault in the driver-side mirror position sensor. Memory mirror positions cannot be saved or restored reliably.
- Check engine light: Not always
- Emissions related: No
- Repair difficulty: medium
Symptoms
- Warning light or symbol related to the affected system
- Comfort or safety function impaired
Common causes
Ordered by how often each turns out to be the cause.
- Position sensor or potentiometer failedCommon
- Water ingress into mirror assemblyPossible
Parts involved
- Mirror Position Sensor
- Mirror Motor Assembly
B0125 is a generic OBD-II code defined by SAE J2012. Exact wording and diagnostic procedure vary by manufacturer and model. Code definitions are drawn from the public-domain OBDex dataset; the workshop notes are our own.