P0A21
Motor Torque Sensor Circuit Intermittent
P0A21 is an OBD-II diagnostic trouble code meaning: Motor Torque Sensor Circuit Intermittent. Common causes: open or short circuit in the sensor circuit, oxidized or loose connector contacts. Estimated repair cost: $56–167.
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
Error P0A21 by Vehicle Brand
FAQ
What does the P0A21 code mean?
P0A21 is an OBD-II diagnostic trouble code that indicates: Motor Torque Sensor Circuit Intermittent
What causes a P0A21 error code?
The most common causes of P0A21 include: 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.
How do I fix a P0A21 diagnostic trouble code?
To fix P0A21: 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. For a complete diagnosis, use an OBD-II scanner.
Is it safe to drive with P0A21?
Do not drive — repair immediately
How much does it cost to fix P0A21?
The estimated repair cost for P0A21 is $56–167. Actual cost depends on your vehicle, location, and labor rates.
See also: Russian version · NationStat