U014CLost Communication With Battery Energy Control Module D
- Generic OBD-II code · Network
- Turns on the check-engine light
- Can trigger limp mode
- How the car detects it
- U014C is the fourth slot in the battery controller family and points at module D. Such a letter is only needed where a pack is split into many sub-packs with their own monitoring boards, or where a vehicle carries an extra battery, for example a second traction pack or a separate 48 V unit, each reporting to a master controller. The master or the hybrid controller logs U014C once D's frames stop. No manufacturer explains the code publicly. As a guide, GM rates the comparable U0111 for module A as a Type B fault in its 2018 hybrid tables after a 500 ms gap, so a MIL is plausible here too. While D is silent, its cells cannot be supervised; the system will usually cut power, open contactors or refuse charging to stay safe. U0111, U0112 and U014A cover modules A to C.
- What you may notice
- Battery or hybrid system warning
- Reduced drive power or no ready mode
- Charging not possible
- Likely causes
- LikelySupply or ground of battery module D missing
- PossibleInternal pack communication line or connector to D faulty
- RareBattery module D internally faulty
- RareMaster controller configured for a module D that does not match
- Repair
- Workshop only · Usually a job for a workshop.Typical cost: €100 – €3,000
- Related codes
Explanation from obdex (CC0), exactly as the app shows it. Guidance only; confirm with a workshop.