P0D31Drive Motor A Inverter Voltage Sensor A Circuit Intermittent/Erratic
- Generic OBD-II code · Powertrain
- Turns on the check-engine light
- Matters for the ITP
- Can trigger limp mode
- Needs a drive cycle to confirm a fix
- How the car detects it
- P0D31 covers a voltage signal from the drive motor A inverter that drops out or jumps for brief moments without staying out of range long enough for P0D2F or P0D30. No manufacturer documents this code publicly. Related checks show the time scale: Mitsubishi rates the same sensor as failed only after 0.16 to 0.3 s outside its window, so shorter glitches need a separate test. Denso describes comparing the measured inverter input voltage with a value estimated from the motor control loop, which also exposes a signal that jitters. Likely triggers are a loose low-voltage connector at the inverter, a chafed harness, or a sensing circuit in the power electronics that fails with heat or vibration. CARB requires such input signals to be checked for circuit faults and rationality. The hybrid warning may come and go.
- What you may notice
- Hybrid system warning that comes and goes
- Brief power loss or jerky electric drive
- Likely causes
- LikelyLoose or corroded low-voltage connector at the inverter
- PossibleChafed signal wiring with intermittent contact
- PossibleSensing circuit in the power electronics fails with heat or vibration
- Inspection (ITP)
- Matters for the ITP. While the check-engine light is on, the car fails the emissions check.
- Repair
- Workshop only · Usually a job for a workshop.Typical cost: €50 – €3,500
- Related codes
Explanation from obdex (CC0), exactly as the app shows it. Guidance only; confirm with a workshop.