P0E0D: Generator Phase U-V-W Circuit Low

P0E0D is the low member of the generator phase circuit group: a U, V or W line between inverter and generator is pulled toward the negative high-voltage rail or to ground, for instance through damaged insulation or a lower power switch that conducts when it should not. No manufacturer documents P0E0D publicly. From this trio, Mitsubishi's generator unit in the Outlander PHEV only uses the open-circuit code P0E0C and catches dangerous currents with its own code P30A3; for the comparable drive motor trio GM's hybrid tables use only P0C05. CARB requires circuit monitoring of hybrid components. A low phase usually goes together with overcurrent or insulation warnings, so an insulation test of cable and winding belongs in the diagnosis. High counterpart: P0E0E.

Symptoms

• Hybrid system warning light, possibly with insulation fault message
• Generator shut down

Most likely causes

• Phase cable or winding insulation damaged, leakage to ground
• Lower IGBT of one phase leaking or shorted
• Phase voltage evaluation 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. With the connector unplugged, check whether the signal wire is making contact with ground.
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 P0E0D means

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

Frequently asked questions

Can I keep driving with code P0E0D?

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 P0E0D?

The most common causes are: phase cable or winding insulation damaged, leakage to ground; lower IGBT of one phase leaking or shorted; phase voltage evaluation in the inverter faulty.

Related codes

• P0E0CGenerator Phase U-V-W Circuit/Open
• P0E0EGenerator Phase U-V-W Circuit High
• P0C06Drive Motor A Phase U-V-W Circuit Low
• P0A6FGenerator Phase U Current
• P0A72Generator Phase V Current
• P0A75Generator Phase W Current

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.