P0A22 code meaning
Generator Torque Sensor Circuit
Powertrain system Generic code P0Axx codes Check engine light
What P0A22 means
In series or power-split hybrids a separate electric machine runs as generator, driven by the combustion engine. A Honda patent claims a torque sensor inside the hollow shaft of either the traction motor or this generator. P0A22 is the general circuit fault of the generator torque sensor: the control unit receives no usable signal at all, without a more specific low, high or intermittent pattern. No manufacturer documents P0A22 publicly; CARB requires an approved monitoring plan for the generator system. Related: P0A23 plausibility, P0A24 low, P0A25 high, P0A26 intermittent. Charging and engine-driven power generation may be limited.
P0A22 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 P0A22
- Hybrid system warning light
- Reduced battery charging by the engine
- Limited system power
Common causes of P0A22
- Most likelySensor connector at the generator unplugged, loose or corroded
- PossibleOpen circuit in the sensor harness
- PossibleGenerator torque sensor or its electronics failed
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 P0A22 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. |
| 22 | The exact fault in that area. |
What to do next
- Note P0A22 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 P0A22
What does P0A22 mean?
P0A22 means "Generator Torque Sensor Circuit". In series or power-split hybrids a separate electric machine runs as generator, driven by the combustion engine. It is a generic code, so it means the same on every make.
Is it safe to drive with P0A22?
Drive gently and only to a workshop. With P0A22 the car can go into limp mode (reduced power) to protect itself.
Will P0A22 fail an emissions test?
Yes, it can. P0A22 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 P0A22 to fix?
Difficulty: hard. A typical repair takes 1 to 8 hours of work. This is a job for a workshop.
Will P0A22 clear itself after the repair?
Clear the code with a scanner after the repair. If the fault is fixed, it does not come back.