Powertrain, generic

P0E8C Drive Motor A Inverter Voltage Sensor B Circuit

Check engine lightOn
EmissionsRelevant
Drive cycleRequired
Limp modePossible

The inverter of drive motor A may measure its high-voltage DC level at more than one point; sensor B is the second of those channels. P0E8C is the general circuit code for it, used when the signal is missing or electrically invalid without a clear low, high or plausibility verdict. Sensor A of the same inverter uses P0D2D, and a mismatch between both is P2E1A. No manufacturer documents P0E8C itself. Mitsubishi shows what sensor B can be: in the 2023 Outlander PHEV the power drive unit reads the boosted capacitor 2 voltage on a main channel, called V2M, and assigns its faults to P0E8D to P0E8F, while capacitor 1 belongs to sensor A. CARB requires such inputs to be checked for circuit faults. Without a trusted value the controller limits or blocks electric drive.

Likely causes

Sensing circuit for voltage channel B inside the power electronics defective
Low-voltage connector or harness of the inverter loose or damaged
Software fault in the motor control unit

Symptoms

  • Hybrid or EV system warning together with the MIL
  • Reduced electric drive power or vehicle not ready to drive

Repair estimate

DifficultyShop_onlyWorkshop job
Parts and labour€50–3,500
Time0.5–5 h

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

Parts involved

drive motor a inverter voltage sensor bwiring harnesshybrid control module

Related codes

P0E8DP0E8EP0E8FP0E90P0D2DP2E1A

References: law.cornell.edu, mitsubishitechinfo.com.