OBD2 code C0030: Left Front Wheel Speed Sensor Circuit Range/Performance
The signal from the left front wheel speed sensor is implausible relative to the other wheels.
Detected Root Component
Chassis Component
Observed Symptoms
- ABS warning light on
- ESC/stability control deactivated
- Possible reduced brake assist
- Speedometer may behave erratically
Possible Causes
- Metal debris on tone ring (magnetic encoder)
- Sensor air gap too large
- Sensor intermittent at temperature
Tools Required
Interactive Diagnostic
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Parts likely to be the cause (Capteur ABS)
Capteur ABS
Photo d'illustration : Capteur ABS
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Frequently asked questions about code C0030
What does code C0030 mean? ▾
OBD2 code C0030: Left Front Wheel Speed Sensor Circuit Range/Performance. The signal from the left front wheel speed sensor is implausible relative to the other wheels.
What are the symptoms of code C0030? ▾
Code C0030 may cause: ABS warning light on, ESC/stability control deactivated, Possible reduced brake assist, Speedometer may behave erratically. The intensity of these symptoms varies depending on the vehicle and driving conditions.
What causes code C0030? ▾
The most common causes of code C0030 are: Metal debris on tone ring (magnetic encoder), Sensor air gap too large, Sensor intermittent at temperature. A proper OBD2 diagnostic will pinpoint the exact cause.
Is it serious to drive with code C0030? ▾
Yes, code C0030 is critical (Critical). Avoid driving and consult a professional promptly to prevent major damage.
How do I fix code C0030? ▾
Start by reading the code with an OBD2 scanner, then follow the interactive decision tree on this page. Priority causes to check: Metal debris on tone ring (magnetic encoder), Sensor air gap too large, Sensor intermittent at temperature. Difficulty: Medium · Estimated time: 30-60min.