OBD-II code · Network
U0293 Lost Communication with Hybrid Vehicle Control System
The hybrid vehicle network has lost the hybrid control unit (HCU). The vehicle drops out of hybrid operation, often forced into a fail-safe mode that limits torque.
Is it safe to drive with U0293?
The car may go into limp mode (reduced power). Get it diagnosed before a long trip.
Common causes
- Most likelyHCU unpowered
- PossibleHV interlock loop opened
- Less likelyGateway module routing CAN messages incorrectly
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
- 1–8 h
- Emissions test
- Usually unaffected
- Parts involved
- Hybrid Control Unit, Can Bus Wiring
Related codes
- U0290Lost Communication With Active Aerodynamic Feature Control Module D
- U0291Lost Communication With Gear Shift Control Module B
- U0292Lost Communication With Drive Motor Control Module B
- U0294Lost Communication with Powertrain Control Module B
- U0295Lost Communication with Power Steering Control Module
- U0296Lost Communication With AC/DC Converter Control Module A
Code data: OBDex open dataset (CC0). Labour times are typical ranges, not a quote.