P0A21

Motor Torque Sensor Circuit Intermittent

Severity

🔴 High

Can you drive?

Do not drive — repair immediately

Approx. repair cost

$56–167 (est.)

Symptoms

Jerking or jerking when accelerating
Reduced engine power
Check Engine Light Is On
Switching to emergency mode
Unstable operation of the hybrid system

Causes

Open or short circuit in the sensor circuit
Oxidized or loose connector contacts
Mechanical damage to the torque sensor
Problems with the wiring harness near the engine
Malfunction of the powertrain control module (rare)

How to Fix

Check the integrity of the sensor wiring and connectors
Test the sensor resistance (compare with factory parameters)
Clean the contacts from oxides and ensure a reliable connection
If necessary, replace the torque sensor
Calibrate the system after repair

Related codes

P0A22 P0A23 P0A1F