P0A24: Generator Torque Sensor Circuit Low

What it means

The generator torque sensor reports a circuit low fault. Generator torque feedback is unreliable. Wiring faults of this kind typically come from chafing, water ingress at connector seals, or pin push-back — a wiggle test on the harness while the code is active often confirms the location.

At a glance

• Usually lights the check-engine light
• The engine or gearbox may go into limp mode

How it works

The generator torque sensor supplies feedback used to control generator torque in the hybrid drive. This code sets when its circuit signal falls below the expected range, indicating a low signal that may come from a sensor fault, wiring problem, or poor terminal contact.

Common causes

Most likely first.

1. Torque sensor failed
2. Wiring fault
3. Connector pins corroded - high contact resistance

Symptoms

• Hybrid system or check-engine warning light on
• Reduced hybrid power or acceleration
• Possible rough or inconsistent power delivery

How to diagnose it

1. Record freeze-frame data and check live generator torque sensor data to verify that the circuit reading is low under the reported conditions.
2. Inspect the generator torque sensor connector and harness for chafing, moisture, corrosion, or pushed-back pins.
3. Check the sensor circuit for an open, short to ground, or high-resistance connection using the vehicle wiring information.
4. Measure reference, ground, and signal continuity against the manufacturer's specification, including terminal contact quality.
5. If circuit checks pass, test the generator torque sensor for a low output fault.

Common fixes

• Repair an open, shorted, or damaged section of generator torque sensor wiring.
• Clean or replace corroded terminals and restore firm contact.
• Repair a faulty sensor reference or ground connection.
• Replace the generator torque sensor if it continues to produce a low signal with a sound circuit.

Can I keep driving?

Low generator torque feedback can lead to reduced or inconsistent hybrid power. Avoid hard acceleration; if the vehicle enters limp mode or power drops sharply, stop safely and arrange diagnosis.