C0035 Guide to Diagnosing
Right Front Wheel Speed Sensor Supply
The OBD-II code C0035 refers to a problem with the right front wheel speed sensor supply circuit. This sensor is an essential part of the vehicle's anti-lock braking system (ABS), traction control, and other systems that rely on wheel speed data for proper operation. The sensor detects the rotational speed of the wheel and sends this information to the vehicle's control module. The "supply" refers to the electrical power that powers the sensor, which may be interrupted, malfunctioning, or unstable, causing incorrect or no data transmission to the control system.
Symptoms:
ABS Light On, Traction Control Warning, Erratic or Unresponsive Braking, Decreased Vehicle Stability, Vehicle Speedometer Issues, DTC Stored
Possible Causes of C0035 Code :
- Faulty Wheel Speed Sensor: The most common cause is the failure of the wheel speed sensor itself, which can malfunction due to wear, corrosion, or internal failure.
- Damaged Wiring or Connector: The wiring harness or connector that links the wheel speed sensor to the vehicle's control system could be damaged, corroded, or disconnected.
- Poor Ground Connection: The wheel speed sensor may have an improper ground connection, affecting its ability to send data accurately.
- Faulty ABS Module: A malfunction in the ABS module or control unit may lead to incorrect sensor readings or loss of communication with the sensor.
- Contaminants: Dirt, debris, or metal shavings near the sensor or on the sensor’s magnetic components can interfere with its ability to measure wheel speed accurately.
- Bad Fuse or Relay: A blown fuse or malfunctioning relay in the power supply circuit can disrupt the sensor's electrical power.
- Corrosion or Rust on Sensor: Corrosion of the sensor or its connector due to exposure to moisture and road salt can prevent it from functioning properly.
How to Fix it?
Ensure to check for any damaged components and inspect the connector pins for signs of being broken, bent, pushed out, or corroded.
Common Diagnose and Repairs:
- Visual Inspection: Check the right front wheel sensor and wiring for any visible damage, corrosion, or loose connections.
- Test the Sensor: Using a multimeter, measure the resistance or voltage output of the sensor to see if it falls within the manufacturer's specified range.
- Check Wiring and Connectors: Inspect the wiring harness and connectors for signs of wear or damage and ensure the connections are secure.
- Inspect the ABS Module: If the sensor and wiring appear functional, the ABS module or control unit may need to be tested for proper function.
- Check for Faulty Fuse or Relay: Inspect the vehicle’s fuse box for any blown fuses or malfunctioning relays associated with the ABS and wheel speed sensor system.
