OBD-II code · Network
U0117 Lost Communication with Drive Motor Control Module 2
The Drive Motor Control Module 2 has stopped transmitting on the vehicle data bus, so other control units no longer receive its messages. The second drive-motor controller is silent, limiting electric drive on that axle. Typical causes are loss of power or ground at the module, an open or shorted CAN/LIN bus wire, a connector fault, or an internal module failure.
Is it safe to drive with U0117?
The car may go into limp mode (reduced power). Get it diagnosed before a long trip.
Common causes
- Most likelySecondary drive motor module unpowered
- PossibleCAN wiring to secondary drive motor broken
- 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
- 2–10 h
- Emissions test
- Usually unaffected
- Parts involved
- Drive Motor Control Module, Can Bus Wiring
Related codes
- U0292Lost Communication With Drive Motor Control Module B
- U029BLost Communication With Drive Motor Control Module C
- U029CLost Communication With Drive Motor Control Module D
- U0114Lost Communication with 4WD Clutch Control Module
- U0115Lost Communication with ECM/PCM "B"
- U0116Lost Communication with Steering Effort Control Module
- U0118Lost Communication with Cabin Air Quality Sensor Module
- U0119Lost Communication with Steering Column Control Module
- U011ALost Communication With Exhaust Gas Sensor Module A
Code data: OBDex open dataset (CC0). Labour times are typical ranges, not a quote.