Drive Motor A Inverter Voltage Sensor A” Circuit Intermittent/Erratic
What it means
The drive motor A inverter voltage sensor A circuit is dropping out or jumping around instead of giving a steady signal. The sensor lets the control module monitor the voltage feeding the drive motor inverter, which it uses to manage motor power.
Can I keep driving? Usually yes for a short trip, but power may be reduced or the car may stop without warning; get it read soon. Do not open high-voltage (orange) cables or covers yourself; leave that to a trained technician.
What this part does
The drive motor inverter voltage sensor measures the high-voltage level supplied to the inverter that powers the electric drive motor. The motor control module uses the reading to regulate motor output and to protect the electronics from over- or under-voltage. Work on high-voltage parts is for trained people only. When it fails, you may see a warning light or reduced power.
Common symptoms
What you'll notice
- Poor performance
- Warning light illuminates
Common causes
Most likely first
- Loose or damaged wiring connections in the drive motor A inverter voltage sensor A circuit
- Faulty drive motor A inverter voltage sensor A
- Malfunctioning drive motor A inverter
- Faulty control module
How to diagnose & fix
Work through it in order
- Check the wiring connections and harness for any loose or damaged connections
- Inspect the motor inverter voltage sensor for any signs of damage or malfunction
- Verify the voltage output of the sensor using a multimeter to ensure it is within the specified range
- Clear the error code to see if it reappears
- Replace the motor inverter voltage sensor if all other steps have been completed and the issue persists
Related codes
Read & clear P0D31 yourself
Scan your car, confirm the code, and clear it once it's fixed — with OBD DashX on your phone.
Need a scanner that reads ABS, airbag and more? GaragePro OBD scan tools ship worldwide. See scanners →