P0A25 code meaning
Generator Torque Sensor Circuit High
Powertrain system Generic code P0Axx codes Check engine light
What P0A25 means
With P0A25 the control unit sees the generator torque sensor signal above its permitted upper limit for longer than the calibrated debounce time. The common electrical explanations are a short from the signal line to the supply or battery voltage, an interrupted sensor ground, or a sensor output stuck at its maximum. The sensor belongs to the engine-driven generator of a hybrid; a Honda patent shows torque sensing inside a hollow generator or motor shaft. No manufacturer documents P0A25 publicly; CARB only demands an approved generator monitor. Opposite fault: P0A24; plausibility: P0A23; intermittent: P0A26. Generator torque is usually limited.
P0A25 at a glance
- Check engine lightYes, usually on
- Emissions testCan fail
- Limp modePossible
- Repair difficultyHard
- Typical labor1 to 8 hours
- Clears after repairWhen cleared with a scanner
Symptoms of P0A25
- Hybrid system warning light
- Generator output limited
Common causes of P0A25
- Most likelySignal line shorted to supply or battery voltage
- PossibleOpen sensor ground
- Less likelySensor output stuck high
Check the most likely causes first. Replacing parts by guesswork is the most expensive way to clear a code.
Parts involved
Generator torque sensorWiring harnessHybrid control module
What each part of P0A25 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. |
| 25 | The exact fault in that area. |
What to do next
- Note P0A25 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 P0A25
What does P0A25 mean?
P0A25 means "Generator Torque Sensor Circuit High". With P0A25 the control unit sees the generator torque sensor signal above its permitted upper limit for longer than the calibrated debounce time. It is a generic code, so it means the same on every make.
Is it safe to drive with P0A25?
Drive gently and only to a workshop. With P0A25 the car can go into limp mode (reduced power) to protect itself.
Will P0A25 fail an emissions test?
Yes, it can. P0A25 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 P0A25 to fix?
Difficulty: hard. A typical repair takes 1 to 8 hours of work. This is a job for a workshop.
Will P0A25 clear itself after the repair?
Clear the code with a scanner after the repair. If the fault is fixed, it does not come back.