Powertrain, generic

P0E90 Drive Motor A Inverter Voltage Sensor B Circuit Intermittent/Erratic

Check engine lightOn
EmissionsRelevant
Drive cycleRequired
Limp modePossible

P0E90 is meant for a voltage sensor B signal of the drive motor A inverter that flickers, jumps or drops out for moments without staying wrong long enough for the low or high code. No manufacturer documents P0E90 publicly. The documented siblings show how short the window is: Mitsubishi's 2023 Outlander PHEV flags the same channel (V2M at capacitor 2) as too low or too high only after 0.16 s beyond 0.45 V or 4.75 V, and as implausible after 0.2 s of deviation, so shorter glitches need an extra stability test. CARB asks for input signals to be checked for circuit and rationality faults. In practice a loose low-voltage plug on the inverter, a chafed lead or a solder joint that opens with heat and vibration is the usual cause. Warnings may appear and vanish again.

Likely causes

Loose or corroded low-voltage connector on the inverter
Chafed or partly broken signal lead
Measuring circuit in the power electronics failing intermittently with heat or vibration

Symptoms

  • Hybrid warning that comes and goes
  • Short power interruptions or jerky electric 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

P0E8CP0E8DP0E8EP0E8FP0D31

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