U0339Software Incompatibility With Body Control Module B
- Generic OBD-II code · Network
- How the car detects it
- Body control module B is a second body controller that takes over part of the switching, for example in a rear or auxiliary junction box. U0339 means a partner module rejects its software or setup; U0331 covers unit A, U0322 vehicles with a single body controller. Jaguar uses exactly this name: on the 2010 XF 5.0 V8 and the 2010–2011 XK, the auxiliary junction box, listed as body control module B, could drop the fuel pump relay after start, so the engine stalled once the high-pressure pump ran short; recall J017 loaded revised software and reconfigured that box. Ford has a BCM-B on 2022–2023 Mustang Stealth models, where a wrong configuration left the sill plates dark until program 23B60 reconfigured it with FDRS. U0142 is lost contact, U0443 invalid data. Usually no MIL.
- What you may notice
- Functions switched by the second body module fail, such as lights or sill plate illumination
- Depending on its tasks, engine may stall or not start
- Network codes in several modules after body module work
- Likely causes
- LikelyBody control module B carries a configuration that does not match the vehicle
- PossibleUnit B left on an older software level after an update campaign
- RareAuxiliary junction box replaced without programming
- Repair
- Workshop only · Usually a job for a workshop.Typical cost: €60 – €800
- Related codes
Explanation from obdex (CC0), exactly as the app shows it. Guidance only; confirm with a workshop.