P0E0E: Generator Phase U-V-W Circuit High

P0E0E reports a generator phase line that reads high: one of the U, V or W connections is held near the positive high-voltage potential, typically by an upper power switch that stays on or by a short to the positive rail. No manufacturer documents P0E0E publicly; the generator units Mitsubishi describes for the Outlander PHEV only use P0E0C here, and in GM's tables only the open-phase check P0C05 is used for the corresponding drive motor group. CARB still requires circuit faults of hybrid components to be detected. Because a phase stuck high lets current flow without control, inverters normally shut the gate drive off at once; the generator then stops supplying charge and the vehicle runs with restricted hybrid function. Low and open counterparts: P0E0D, P0E0C.

Symptoms

• Hybrid system warning light and MIL on
• Generator shut down, no charging while driving

Most likely causes

• Upper IGBT of one phase shorted or not switching off
• Phase line shorted to the positive high-voltage rail
• Phase monitoring in the inverter faulty

What to check, in order

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

1. Measure the voltage with the engine off and running
2. Check the sensor's ground and make sure the signal wire is not receiving voltage from another circuit.
3. Clean and tighten the terminals
4. Check the accessory belt
5. Run a battery load test
6. Check the alternator wiring

Good to know

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

What each character of P0E0E means

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

Frequently asked questions

Can I keep driving with code P0E0E?

If the battery warning light comes on, you could get stranded. Turn off electrical accessories and go straight to a repair shop.

What causes code P0E0E?

The most common causes are: upper IGBT of one phase shorted or not switching off; phase line shorted to the positive high-voltage rail; phase monitoring in the inverter faulty.

Related codes

• P0E0CGenerator Phase U-V-W Circuit/Open
• P0E0DGenerator Phase U-V-W Circuit Low
• P0C07Drive Motor A Phase U-V-W Circuit High
• P0A71Generator Phase U Current High
• P0A74Generator Phase V Current High
• P0A77Generator Phase W Current High

Sources

• law.cornell.edu: 13 CCR 1968.2
• mitsubishitechinfo.com: N503240440000700USA
• gsi.ext.gm.com: 11OBDG01 HYBRID Diagnostics

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.