U0531Invalid Data Received From Rear Gate Module
- Generic OBD-II code · Network
- How the car detects it
- The rear gate module runs a powered liftgate or tailgate: motor drive, latch, pinch sensing and the requests from switches or key fob. U0531 is stored when its messages reach other controllers with content they refuse. No manufacturer documents U0531 itself, but its lost-communication partner U0230 appears in several bulletins. GM's Saab 9-5 code list calls the unit liftgate control module; GM PIT5422 traced U0230 on 2010–2015 Equinox and Terrain to water or corrosion in connector X901 in the upper liftgate area on the low-speed LAN; Toyota T-SB-0038-15 lists U0230 with B2222 on 2008–2013 Highlander whose power back door reversed instead of latching. FCA's WL Grand Cherokee shows signal-invalid codes inside the liftgate module. Driving is unaffected.
- What you may notice
- Power liftgate does not open or close electrically
- Liftgate reverses at the fully closed position
- Interior lamps or other body functions fail at the same time (shared LAN)
- Likely causes
- LikelyWater ingress or corrosion in connectors at the liftgate
- PossibleLiftgate module software fault (update available on some models)
- PossibleBroken wires in the harness passing through the liftgate hinge area
- RareHinge or drive damage after repeated obstruction while closing
- Repair
- Medium · Usually a job for a workshop.Typical cost: €0 – €800
- Related codes
Explanation from obdex (CC0), exactly as the app shows it. Guidance only; confirm with a workshop.