OBD-II code · Network
U0440 Invalid Data Received from Drive Motor Control Module
The Drive Motor Control Module is present on the data bus but the values it reports are implausible — out of range, frozen, or failing the checksum or rolling-count check. The receiving modules reject the data. Electric-drive torque control becomes unreliable. Causes include a faulty sensor feeding the module, internal computation errors, a software or calibration mismatch after a repair, or bus interference corrupting the frames.
Is it safe to drive with U0440?
The car may go into limp mode (reduced power). Get it diagnosed before a long trip.
Common causes
- Most likelyDrive motor resolver/sensor drift
- PossibleDrive motor module internal fault
- 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
- 2–8 h
- Emissions test
- Usually unaffected
- Parts involved
- Drive Motor Control Module, Can Bus Wiring
Related codes
- U043DInvalid Data Received From Accelerator Pedal Module
- U043EInvalid Data Received From Vacuum Sensor A
- U043FInvalid Data Received From Vacuum Sensor B
- U0441Invalid Data Received From Emissions Critical Control Information
- U0442Invalid Data Received From ECM/PCM B
- U0443Invalid Data Received From Body Control Module B
Code data: OBDex open dataset (CC0). Labour times are typical ranges, not a quote.