U0143Lost Communication With Body Control Module C
- Generic OBD-II code · Network
- How the car detects it
- With U0143 a listener reports that body controller C has gone quiet. The letter only means a third body unit; its role is set by the maker. Ford is the one maker found using the code publicly: on the 2021 F-150 the trailer module stores U0143:87, the suffix marking a missing message, because of software parameters in that module. Ford's SSM 50217 calls it harmless, with no warning or drivability effect, and announced an over-the-air update of the trailer module from March 2022. So on these trucks a lone U0143 in the trailer module is no reason to replace anything. Elsewhere the usual network rule applies: a supervised periodic message from module C is missing while supply voltage is valid. U0140 to U0142 cover the other body modules, U0444 invalid data from C.
- What you may notice
- Often none; code found only during a scan
- Functions of module C (for example trailer-related outputs) unavailable
- Scan tool cannot reach module C
- Likely causes
- LikelySoftware parameters in the listening module (Ford F-150 trailer module)
- PossiblePower, fuse or ground of module C missing
- PossibleBus line or connector to module C damaged
- RareBody module C 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.