U0502Invalid Data Received From Door Control Module C
- Generic OBD-II code · Network
- How the car detects it
- For door control module C the letter is a weak guide. In the generic list its lost-communication partner is U0201, yet GM's 2011 Saab 9-5 code list uses U0201 for the transfer case control module. So on some makes the slot is not a door at all, and the vehicle's own fault text decides. Where it does mean a third door unit, the check is the usual one: frames from C arrive, but their content is rejected because a signal is undefined, the alive counter does not step correctly or the checksum fails. Saab sorts such findings into subtypes 71, 72 and 74 after the code. No public bulletin names U0502. Door-related effects, if any, are confined to the door C controls; total loss of contact is U0201.
- What you may notice
- Lock, window or mirror of one door working only sometimes
- Stored code without noticeable fault
- Likely causes
- PossibleDoor control module C internally faulty
- PossibleDamaged wiring in the door hinge area
- RareManufacturer uses this code slot for another module
- Repair
- Medium · Usually a job for a workshop.Typical cost: €0 – €500
- Related codes
Explanation from obdex (CC0), exactly as the app shows it. Guidance only; confirm with a workshop.