P0A4E: Generator Position Sensor Circuit High

P0A4E is set when a generator resolver signal sits above its permitted range, which usually points to an open signal line pulled up by the input circuit or a short to a supply voltage. No manufacturer documents P0A4E publicly. Mitsubishi evaluates the same condition on the 2023 Outlander PHEV but reports it under its own codes: a sine or cosine voltage of 4.9 V or more for 0.21 s stores P0C67 or P0C6C. A Bosch patent explains how the averaged offset of the receiver coil lines reveals whether a line is shorted to supply rather than to ground. CARB requires out-of-range checks for hybrid input components. P0A4D is the low counterpart, P0A4B the general circuit code, P0A4C the plausibility check. The generator is usually shut off and the hybrid warning comes on.

Symptoms

• Hybrid system warning and MIL
• Generator disabled, engine-only or no-start condition

Most likely causes

• Open resolver signal line or pushed-out terminal
• Signal line shorted to a supply voltage
• Faulty resolver input stage in the power drive unit

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 P0A4E means

• P: Powertrain: engine and transmission
• 0: Generic code: same on every make
• A: Hybrid or air and fuel
• 4E: Specific fault in that system

Frequently asked questions

Can I keep driving with code P0A4E?

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 P0A4E?

The most common causes are: open resolver signal line or pushed-out terminal; signal line shorted to a supply voltage; faulty resolver input stage in the power drive unit.

Related codes

• P0A4DGenerator Position Sensor Circuit Low
• P0A4BGenerator Position Sensor Circuit
• P0A4CGenerator Position Sensor Circuit Range/Performance
• P0A4FGenerator Position Sensor Circuit Intermittent
• P0C67Generator Position Sensor Circuit A High
• P0C6CGenerator Position Sensor Circuit B High

Sources

• mitsubishitechinfo.com: N503240240000800USA
• patents.google.com: en
• 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.