P0E71: Generator Torque Delivered Performance

P0E71 compares the torque that the hybrid generator or motor-generator actually provides with the value requested by the hybrid control. If the two drift apart beyond a calibrated margin, the code is set. Ford uses it codegenau in its 2024 to 2025 gasoline OBD summary: in the three-byte format P0E71-48 replaces the older P061B for a motor torque plausibility error on vehicles with the modular hybrid transmission (MHT), rated MIL plus wrench lamp. The monitor runs continuously and needs less than one second to register a fault. Under CARB, powertrain components whose failure can raise emissions fall under the comprehensive component checks. Causes range from inverter faults and position sensor errors to winding damage. Expect reduced power, limited hybrid operation or a disabled hybrid system.

Symptoms

• MIL and service wrench lamp on (Ford)
• Reduced power or emergency running mode
• Engine runs more often, hybrid assistance missing

Most likely causes

• Fault in the inverter stage feeding the generator
• Rotor position sensor (resolver) delivering a wrong angle
• Control software needing an update
• Damaged generator winding or internal contamination

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. Compare the reading with other engine data while varying the engine speed.
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 P0E71 means

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

Frequently asked questions

Can I keep driving with code P0E71?

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 P0E71?

The most common causes are: fault in the inverter stage feeding the generator; rotor position sensor (resolver) delivering a wrong angle; control software needing an update.

Related codes

• P0A92Hybrid Generator Performance
• P0A90Drive Motor A Performance
• P061BInternal Control Module Torque Calculation Performance

Sources

• fordservicecontent.com: OBDSM2400OUTPUT 16Jul2024 WSM final V2 MCS7001
• 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.