◆OBD Codes

C0125

Power Steering Torque Sensor Circuit

Moderatesensor

Overview

The C0125 diagnostic trouble code means the chassis control module has identified a power steering torque sensor circuit problem. This code indicates that a chassis sensor or its circuit is not providing expected readings to the ABS/stability control system. Accurate sensor data is essential for the proper operation of anti-lock brakes, traction control, and electronic stability control, and a fault in this circuit can cause these safety systems to be disabled.

Symptoms

  • Traction control warning light on
  • Stability control (ESC/VSC) warning light on
  • Unusual clicking or grinding noise from wheel area
  • Loss of anti-lock braking function

Common Causes

  • Damaged ride height sensor or linkage
  • Faulty steering angle sensor
  • Damaged wheel bearing causing sensor misalignment
  • Faulty wheel speed sensor

Diagnosis Steps

  1. 1Connect an OBD-II scanner and read all stored chassis trouble codes and freeze frame data
  2. 2Monitor wheel speed sensor signals using scan tool live data while driving
  3. 3Inspect the affected sensor and its wiring connector for damage or corrosion
  4. 4Check the sensor air gap and tone ring for damage, debris, or excessive wear
  5. 5Test the sensor resistance and voltage output with a multimeter; compare to specifications

Estimated Repair Cost

$100 — $500

Cost varies by vehicle, location, and repair shop. Includes parts and labor.

Commonly Affected Vehicles

Subaru OutbackHonda CivicToyota RAV4Ford Escape

Related Codes

C0087C0083C0040

More Sensor Codes

P0070Ambient Air Temperature Sensor Circuit
Low
P0071Ambient Air Temperature Sensor Range/Performance
Low
P0072Ambient Air Temperature Sensor Circuit Low
Low
P0073Ambient Air Temperature Sensor Circuit High
Low
P0074Ambient Air Temperature Sensor Circuit Intermittent
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P0095Intake Air Temperature Sensor 2 Circuit
Low

Frequently Asked Questions

The most common causes are a faulty sensor, damaged tone ring, excessive air gap, metallic debris on the sensor tip, corroded wiring, or a worn wheel bearing that allows the sensor to lose alignment with the tone ring.