Powertrain, generic

P0E93 Drive Motor B Inverter Voltage Sensor B Circuit Low

Check engine lightOn
EmissionsRelevant
Drive cycleRequired
Limp modePossible

With P0E93 the controller sees the B voltage channel in the motor B inverter stuck near the bottom of its signal range, as happens with a short to ground, an open signal path or a failed measuring circuit. No manufacturer documents P0E93 publicly. Mitsubishi's rear motor sensor A on the 2023 Outlander PHEV gives a comparable limit: its low code P0DA5 sets once the signal sits at or below 0.55 V for 0.3 s with the rear motor unit powered at 8 V or more, and the checks start with the battery management and the high-voltage cables to the rear motor before the motor unit itself. Drive motor A has the equivalent sensor B fault as P0E8E. If several channels read low together, missing high voltage is more likely than a sensor fault. Motor B is normally disabled until the reading is valid.

Likely causes

Measuring circuit for channel B in the motor B inverter failed
Signal line shorted to ground or open
High-voltage cable or connection to motor B open, no voltage at the inverter

Symptoms

  • MIL and EV system warning
  • Rear or second motor without power, front-drive only

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 b inverter voltage sensor bwiring harnesshybrid control module

Related codes

P0E94P0E91P0E92P0DA5P0E8E

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