P0E90Drive Motor A Inverter Voltage Sensor B Circuit Intermittent/Erratic
- Generic OBD-II code · Powertrain
- Turns on the check-engine light
- Matters for the ITP
- Can trigger limp mode
- Needs a drive cycle to confirm a fix
- How the car detects it
- 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.
- What you may notice
- Hybrid warning that comes and goes
- Short power interruptions or jerky electric drive
- Likely causes
- LikelyLoose or corroded low-voltage connector on the inverter
- PossibleChafed or partly broken signal lead
- PossibleMeasuring circuit in the power electronics failing intermittently with heat or vibration
- Inspection (ITP)
- Matters for the ITP. While the check-engine light is on, the car fails the emissions check.
- Repair
- Workshop only · Usually a job for a workshop.Typical cost: €50 – €3,500
- Related codes
Explanation from obdex (CC0), exactly as the app shows it. Guidance only; confirm with a workshop.