P0E10: Generator Inverter Power Supply A Circuit Low

P0E10 means supply A of the generator inverter is present but too low. Ford lists the code in the HEV OBD system summary for its power-split hybrids (OBDSM1901): in the paragraph on the gate signal lines of motor and generator, P0E10 appears with P0BCE and P0BCF among the generator-side open-circuit faults, while the motor side is covered by P0C0C. For Ford, P0E10 is therefore tied to the gate drive path of the generator inverter rather than to a separate supply part, and no voltage limit is published. CARB requires circuit monitoring for such hybrid components. A weak gate drive supply can leave the power switches only partly turned on so they overheat, which is why the inverter limits or stops the generator. Siblings: P0E0F and P0E11.

Symptoms

• Hybrid system warning light and MIL on
• Generator limited or switched off, reduced hybrid performance

Most likely causes

• Gate drive supply or gate signal path in the inverter faulty (Ford)
• Low 12 V supply to the inverter, e.g. weak battery or poor ground
• Corroded or loose inverter connector

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. With the connector unplugged, check whether the signal wire is making contact with ground.
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 P0E10 means

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

Frequently asked questions

Can I keep driving with code P0E10?

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 P0E10?

The most common causes are: gate drive supply or gate signal path in the inverter faulty (Ford); low 12 V supply to the inverter, e.g. weak battery or poor ground; corroded or loose inverter connector.

Related codes

• P0E0FGenerator Inverter Power Supply A Circuit/Open
• P0E11Generator Inverter Power Supply A Circuit High
• P2CC6Generator Inverter Power Supply B Circuit Low
• P0C0CDrive Motor A Inverter Power Supply Circuit Low
• P0BCEGenerator Inverter Temperature Sensor A Circuit Low
• P0BCFGenerator Inverter Temperature Sensor A Circuit High

Sources

• fordservicecontent.com: OBDSM1901 HEV
• law.cornell.edu: 13 CCR 1968.2
• gsi.ext.gm.com: 19OBDG01 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.