OBD-II code · Network
U027A Lost Communication With Battery Charger Control Module C
The vehicle bus reports loss of communication with battery charger control module C. AC/DC charging coordination for the high-voltage battery via this node is suspended.
Is it safe to drive with U027A?
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
- Battery Charger Module C, Vehicle Bus Wiring
Related codes
- U019BLost Communication With Battery Charger Control Module A
- U01BBLost Communication With Battery Charger Control Module B
- U027BLost Communication With Battery Charger Control Module D
- U0277Lost Communication With Seat Control Module K
- U0278Lost Communication With Seat Control Module L
- U0279Lost Communication With Haptic Control Module
- U027CLost Communication With Off-Board Charger Control Module
- U0284Lost Communication With Active Grille Air Shutter Module A
Code data: OBDex open dataset (CC0). Labour times are typical ranges, not a quote.