Powertrain, generic

P0E8D Drive Motor A Inverter Voltage Sensor B Circuit Range/Performance

Check engine lightOn
EmissionsRelevant
Drive cycleRequired
Limp modePossible

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.

Likely causes

Fault in the power electronics or its voltage measurement (Mitsubishi, Audi)
Drift of voltage channel B so that it no longer matches the other channels
Wrong reference value from another high-voltage unit (rear motor unit, battery management)

Symptoms

  • Red high-voltage system warning at start, stop safely (Audi)
  • MIL and hybrid warning, reduced or no electric drive

Repair estimate

DifficultyShop_onlyWorkshop job
Parts and labour€100–5,000
Time0.5–6 h

Typical range across vehicles; the real cost depends on what the testing finds.

Parts involved

drive motor a inverter voltage sensor bdrive motor a inverterhybrid control module

Related codes

P0E8CP0E8EP0E8FP0D2EP2E1AP0C0C

References: mitsubishitechinfo.com, static.nhtsa.gov, static.nhtsa.gov.