U0296Lost Communication With AC/DC Converter Control Module A
- Generic OBD-II code · Network
- Turns on the check-engine light
- Matters for the ITP
- Can trigger limp mode
- How the car detects it
- An AC/DC converter rectifies alternating current; in plug-in vehicles the best known example is the on-board charger, which also runs in the opposite direction of an inverter feeding a motor. U0296 means converter module A no longer reports on the bus. CARB obliges plug-in hybrids to detect charger malfunctions that prevent full charging or limit the charge rate. Volvo is the maker that names the code: on plug-in XC60 and XC90 models from 2022, brake control module 2 logs BCM2-U029600, the ESC lamp comes on and Pure mode is locked out whenever a third-party device or Y-splitter loads the diagnostic socket (TJ 36559). On 2016–2018 T8 models the code appeared intermittently next to rear-axle inverter faults and cleared with inverter software (TJ 33723).
- What you may notice
- ESC or hybrid system warning in the cluster
- Pure electric driving not available
- Charging from the grid not possible
- Likely causes
- LikelyAftermarket device or Y-splitter on the diagnostic connector disturbing the bus
- PossibleOutdated software in the converter or inverter module
- PossibleSupply, ground or bus wiring of converter A faulty
- RareConverter module A internally failed
- Inspection (ITP)
- Matters for the ITP. While the check-engine light is on, the car fails the emissions check.
- Repair
- Medium · Usually a job for a workshop.Typical cost: €0 – €3,000
- Related codes
Explanation from obdex (CC0), exactly as the app shows it. Guidance only; confirm with a workshop.