U0248Lost Communication With Remote Accessory Module
- Generic OBD-II code · Network
- How the car detects it
- No manufacturer explains publicly what the remote accessory module does or when U0248 is set. The name suggests a body-side unit that switches accessories outside the main controllers. Separate codes exist for Ford's SYNC interface unit (APIM, U0253) and for a remote start module (U0254). For the 2011 Saab 9-5, GM explains how lost-communication codes arise in general: receivers check for expected signals, some serving as a sender's heartbeat; when one stops, they fall back to default values and record a lost-contact code for that sender. The same GM code list has no entry for U0248. Any listener would follow that scheme once this module falls silent. What the driver notices depends entirely on the accessory involved; driving is unaffected. Invalid data from it are U0549.
- What you may notice
- Accessory function controlled by the module inoperative
- Code stored in other modules without noticeable fault
- Likely causes
- LikelyModule without power or ground (fuse, connector)
- PossibleRetrofitted or removed accessory, module configured but not present
- PossibleBus wiring or connector to the module damaged
- RareModule internally faulty
- Repair
- Medium · Usually a job for a workshop.Typical cost: €0 – €600
- Related codes
Explanation from obdex (CC0), exactly as the app shows it. Guidance only; confirm with a workshop.