Powertrain, generic · Hybrid propulsion
P0A24 Generator Torque Sensor Circuit Low
Check engine lightOn
EmissionsRelevant
Drive cycleNot required
Limp modePossible
P0A24 is stored when the voltage from the generator torque sensor stays under its lower diagnostic limit for a calibrated time. Electrically this means the line is pulled toward ground, the sensor supply is missing or the signal wire is broken. The sensor measures torque on the shaft of the engine-driven generator; a Honda patent describes such a sensor inside a hollow generator or motor shaft. No manufacturer documents P0A24 publicly; CARB requires an approved generator monitoring plan. The upper limit is P0A25, implausible but valid readings are P0A23, short dropouts P0A26. Electric generation may be cut back.
Likely causes
Signal line shorted to ground
Sensor supply voltage missing
Sensor electronics failed with output stuck low
Symptoms
- Hybrid system warning light
- Reduced charging and system power
Repair estimate
DifficultyHardWorkshop job
Parts and labour€100–3,000
Time1–8 h
Typical range across vehicles; the real cost depends on what the testing finds.
Parts involved
generator torque sensorwiring harnesshybrid control module
Related codes
References: patents.google.com, law.cornell.edu.