U0161Lost Communication With Compass Module
- Generic OBD-II code · Network
- How the car detects it
- U0161 says the compass module no longer reports. In many vehicles the electronic compass sits in the interior mirror or the overhead console: a pair of perpendicular magnetic sensors measures the earth's field, and the module sends the heading to a display. A Gentex patent describes such a mirror compass and mentions output over the vehicle bus. The receiving unit, usually the instrument cluster or an overhead display, stores U0161 when the expected heading messages stop; the general rule is GM's description for U0100-U02FF codes. No manufacturer documents U0161 publicly. U0462 flags implausible compass data. The heading display shows dashes or disappears; no MIL and no effect on driving.
- What you may notice
- Compass heading missing or shown as dashes
- Compass calibration not possible
- Code stored in the cluster or overhead module
- Likely causes
- LikelyCompass module or mirror without power or ground
- PossibleConnector at the mirror or headliner loose, e.g. after windscreen replacement
- RareData line in the A-pillar or headliner damaged
- RareCompass module or mirror electronics faulty
- Repair
- Medium · Often possible to do yourself.Typical cost: €20 – €600
- Related codes
Explanation from obdex (CC0), exactly as the app shows it. Guidance only; confirm with a workshop.