What does it mean?
U2013 is a Network (CAN bus, module communications) fault code. It indicates: Compass Module is Not Responding .
Symptoms
- Compass heading missing, frozen or clearly wrong
- Display shows dashes instead of a heading
- Auto-dimming mirror or interior lighting may fail at the same time
- Outside temperature display may also be lost where the two share a module
- Scan tool cannot reach the compass module
- Code returns immediately after clearing
Likely causes
- Compass module without power — blown fuse or lost ignition feed
- Connector at the mirror or overhead console loose or corroded
- Damaged wiring in the headliner or A-pillar, often after windscreen or headliner work
- Compass built into the mirror assembly failing internally
- Poor ground at the module mounting point
- Bus wiring fault between the compass module and the body module
- Module replaced without configuration, or never calibrated for the zone
How to fix it
- Check the fuse and measure supply voltage and ground at the module connector
- Reseat the mirror or overhead console connector and inspect for corrosion and bent pins
- Inspect the headliner and A-pillar wiring for pinched or cut wires after previous work
- Verify bus continuity from the compass module to the body module
- Carry out the compass calibration and zone setting procedure before condemning anything
- Move magnetic objects and phone holders away from the mirror area and retest
- Replace the compass or mirror assembly only after power, ground and bus test good