C0035: Left Front Wheel Speed Sensor Circuit Malfunction
Can you still drive? Yes, but ABS and traction control will be disabled. Drive cautiously, especially in wet or slippery conditions. Brakes still work normally without ABS.
What Does C0035 Mean?
Code C0035 indicates that the ABS control module has detected a fault in the left front wheel speed sensor circuit. The sensor generates a signal proportional to wheel speed that the ABS, traction control, and stability control systems rely on. A faulty signal means these safety systems cannot function correctly for that wheel.
Need to read your codes?
An OBD-II scanner lets you read and clear diagnostic trouble codes from your vehicle's computer. Most scanners work with any car made after 1996.
Browse OBD-II Scanners on AmazonCommon Causes
- Faulty left front wheel speed sensor
- Damaged tone ring on the wheel hub or axle
- Cut or chafed sensor wiring near the wheel
- Corroded sensor connector
- Excessive wheel bearing play affecting air gap
Symptoms
- ABS warning light on
- Traction control light on
- Stability control light on
- ABS may not function during braking
- Speedometer may read incorrectly
Diagnostic Steps
- 1Read ABS codes and freeze frame data
- 2Inspect the left front wheel speed sensor and its wiring for physical damage
- 3Check the sensor connector for corrosion
- 4Measure sensor resistance and compare to specification
- 5Inspect the tone ring for missing teeth or damage
- 6Monitor live wheel speed data during a test drive and compare all four wheels
- 7Check wheel bearing for excessive play
Recommended Parts & Tools
wheel speed sensor
ABS tone ring
sensor connector repair kit
wheel bearing assembly
Estimated Repair Cost
| Type | Estimated Cost |
|---|---|
| Total Repair Cost Range | $50 - $400 |
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Frequently Asked Questions
Will my brakes still work with C0035?
Yes, your standard brakes work normally. However, ABS anti-lock functionality is disabled, so wheels may lock up during hard braking.
Can a bad wheel bearing cause C0035?
Yes, a worn wheel bearing can cause excessive play that changes the air gap between the speed sensor and tone ring, generating an erratic or missing signal.
How do I know which wheel speed sensor is bad?
Use a scan tool to compare live wheel speed data from all four wheels. The faulty sensor will show zero, erratic, or significantly different readings.
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