Powertrain, generic · Hybrid propulsion

P0A26 Generator Torque Sensor Circuit Intermittent

Check engine lightOn
EmissionsRelevant
Drive cycleNot required
Limp modePossible

P0A26 points to short interruptions or jumps in the generator torque sensor signal rather than a constant fault. The control unit counts implausible signal changes or brief out-of-range events and sets the code once a calibrated limit is exceeded. Because the sensor works next to the generator, as in the Honda patent with a sensor in a hollow generator or motor shaft, heat cycles, vibration and inverter noise favour loose contacts and chafed wires. No manufacturer documents P0A26 publicly; CARB requires an approved generator monitor. Permanent faults show as P0A24 or P0A25. Symptoms often appear only on rough roads.

Likely causes

Loose or fretted terminal in the sensor connector
Chafed wiring near the generator housing
Shield or ground damage letting inverter noise in

Symptoms

  • Hybrid warning that comes and goes
  • Brief drop in charging or 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

P0A22P0A23P0A24P0A25P0A21

References: patents.google.com, law.cornell.edu.