P0A4E code meaning
Generator Position Sensor Circuit High
Powertrain system Generic code P0Axx codes Check engine light
What P0A4E means
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.
P0A4E at a glance
- Check engine lightYes, usually on
- Emissions testCan fail
- Limp modePossible
- Repair difficultyWorkshop only
- Typical labor1 to 8 hours
- Clears after repairAfter a drive cycle
Symptoms of P0A4E
- Hybrid system warning and MIL
- Generator disabled, engine-only or no-start condition
Common causes of P0A4E
- Most likelyOpen resolver signal line or pushed-out terminal
- PossibleSignal line shorted to a supply voltage
- Less likelyFaulty resolver input stage in the power drive unit
Check the most likely causes first. Replacing parts by guesswork is the most expensive way to clear a code.
Parts involved
Generator position sensorWiring harnessHybrid control module
What each part of P0A4E means
| P | Powertrain system: engine, fuel system, ignition, emissions and transmission. |
| 0 | Generic code: it means the same on every make (SAE standard). |
| A | Area: hybrid propulsion. |
| 4E | The exact fault in that area. |
What to do next
- Note P0A4E and any other codes stored with it: several codes together often point to one cause.
- Check for loose connectors and damaged wiring around the parts the code names.
- Check open recalls for your car: some faults are fixed for free by the dealer. Enter your VIN.
- Clear the code only after the repair. If it comes back, the fault is still there.
Buying a used car? Scan it for stored codes before you pay. A recently cleared memory can hide a problem.
Questions about P0A4E
What does P0A4E mean?
P0A4E means "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. It is a generic code, so it means the same on every make.
Is it safe to drive with P0A4E?
Drive gently and only to a workshop. With P0A4E the car can go into limp mode (reduced power) to protect itself.
Will P0A4E fail an emissions test?
Yes, it can. P0A4E is emissions-related, so most inspection programs fail a car while it is stored or while the check engine light is on.
How hard is P0A4E to fix?
Difficulty: workshop only. A typical repair takes 1 to 8 hours of work. This is a job for a workshop.
Will P0A4E clear itself after the repair?
After the repair the car has to complete a drive cycle (a mix of city and highway driving) before the test runs again. Until then the readiness monitor shows "not ready", which can fail an inspection.