P0E8F: Drive Motor A Inverter Voltage Sensor B Circuit High

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.

Symptoms

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

Most 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

What to check, in order

Start with the simplest. You can tick off each step.

1. Read the codes with a hybrid-compatible scanner and write down the freeze frame data
2. Check the sensor's ground and make sure the signal wire is not receiving voltage from another circuit.
3. Make sure the battery cooling air intake is clean
4. Check the 12 V auxiliary battery, which can also trigger warnings
5. Leave any high-voltage measurements to a specialized repair shop

Good to know

• It can trigger limp mode.
• It affects emissions.

What each character of P0E8F means

• P: Powertrain: engine and transmission
• 0: Generic code: same on every make
• E: Subsystem depends on the code range
• 8F: Specific fault in that system

Frequently asked questions

Can I keep driving with code P0E8F?

If the car still runs, drive as little as possible and go to a specialized repair shop. Do not touch the orange cables: they carry high voltage.

What causes code P0E8F?

The most common causes are: 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.

Related codes

• P0E8EDrive Motor A Inverter Voltage Sensor B Circuit Low
• P0E8CDrive Motor A Inverter Voltage Sensor B Circuit
• P0E8DDrive Motor A Inverter Voltage Sensor B Circuit Range/Performance
• P0D30Drive Motor A Inverter Voltage Sensor A Circuit High
• P0C79Drive Motor A Inverter Voltage Too High

Sources

• mitsubishitechinfo.com: N503240390000700USA
• law.cornell.edu: 13 CCR 1968.2

Values and procedures vary by manufacturer. If it affects brakes, steering, fuel or high voltage, see a professional. Updated: 2026-11-04. How we build these pages.