OBD-II code · Network
U027C Lost Communication With Off-Board Charger Control Module
The vehicle bus reports loss of communication with the off-board charger module. Negotiation with external DC fast-charge stations (CCS, CHAdeMO) and the resulting charging session cannot start.
Is it safe to drive with U027C?
The car may go into limp mode (reduced power). Get it diagnosed before a long trip.
Common causes
- Most likelyBus wiring open or shorted
- PossibleModule without power or ground
- PossibleModule failed
Symptoms
- Multiple warning lights may illuminate
- Affected modules may go into limp mode or shut down
- Specific functions inoperative depending on module
- Diagnostic tools may show communication faults
Repair at a glance
- Difficulty
- Hard
- DIY friendly
- Best left to a mechanic
- Typical labour
- 1–5 h
- Emissions test
- Usually unaffected
- After the fix
- A drive cycle is needed before the light stays off
- Parts involved
- Off Board Charger Module, Vehicle Bus Wiring
Related codes
- U0279Lost Communication With Haptic Control Module
- U027ALost Communication With Battery Charger Control Module C
- U027BLost Communication With Battery Charger Control Module D
- U0284Lost Communication With Active Grille Air Shutter Module A
- U0285Lost Communication With Active Grille Air Shutter Module B
- U0286Lost Communication With Radiator Anti-Tamper Device
Code data: OBDex open dataset (CC0). Labour times are typical ranges, not a quote.