Powertrain, generic

P0E8F Drive Motor A Inverter Voltage Sensor B Circuit High

Check engine lightOn
EmissionsRelevant
Drive cycleRequired
Limp modePossible

P0E8F is the upper-limit fault of inverter voltage sensor B on drive motor A. Mitsubishi's 2023 Outlander PHEV sets it when the main channel at capacitor 2 (V2M) reports at least 4.75 V for 0.16 s, again with the unit supplied at 8 V or above, and lists it as a range check maximum. A reading pinned at the top usually comes from the signal touching the sensor supply, from a lost sensor ground or from a defect in the measuring circuit. A real overvoltage of the bus cannot be ruled out, but it has its own code, P0C79, and would normally show on several channels at once; if sensor A (P0D30) and the battery voltage are normal, the B channel itself is suspect. P0E8E is the low counterpart. The controller protects the inverter by limiting or stopping electric drive.

Likely causes

Measuring circuit for capacitor 2 inside the power drive unit defective
Signal shorted to sensor supply or lost sensor ground
Actual overvoltage on the high-voltage bus

Symptoms

  • MIL and hybrid system warning
  • Electric drive switched off or strongly reduced

Repair estimate

DifficultyShop_onlyWorkshop job
Parts and labour€100–4,000
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 bwiring harnesshybrid control module

Related codes

P0E8EP0E8CP0E8DP0D30P0C79

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