P0E8DDrive Motor A Inverter Voltage Sensor B Circuit Range/Performance
- 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
- P0E8D says that voltage sensor B of the drive motor A inverter delivers a value that is electrically fine but disagrees with other readings of the same bus. Mitsubishi details the check for the 2023 Outlander PHEV, where sensor B is the main channel at capacitor 2 (V2M): with the boost converter switched off and the unit powered with 8 V or more for 0.5 s, a gap of at least 100 V to the rear motor unit, or of at least 50 V to capacitor 1, lasting 0.2 s sets the code, and the hint points to the power drive unit. Audi lists P0E8D00 with P0C0C00 in the electric drive of 2025-2026 Q6 and A6 e-tron models; if all entries appear together with a red high-voltage warning, the power electronics are replaced. Hard circuit faults are P0E8C, P0E8E and P0E8F.
- What you may notice
- Red high-voltage system warning at start, stop safely (Audi)
- MIL and hybrid warning, reduced or no electric drive
- Likely causes
- LikelyFault in the power electronics or its voltage measurement (Mitsubishi, Audi)
- PossibleDrift of voltage channel B so that it no longer matches the other channels
- RareWrong reference value from another high-voltage unit (rear motor unit, battery management)
- 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: €100 – €5,000
- Related codes
Explanation from obdex (CC0), exactly as the app shows it. Guidance only; confirm with a workshop.