Code result
C0033
Left Front Wheel Speed Sensor Signal Erratic
Moderate severity
What it means
The control module sees erratic pulses from the left front wheel speed sensor at speed. Common cause is metallic debris on a magnetic encoder or a damaged tone ring.
Is it safe to drive?
Use caution
The vehicle is usually drivable for short distances, but the problem can worsen or affect emissions. Diagnose and repair as soon as practical.
Most likely causes
Magnetic encoder ring contaminated
highOne of the most commonly reported causes for this code — check this first.
Tone ring cracked or missing teeth
mediumA plausible cause — test and verify before replacing parts.
Connector with intermittent contact under vibration
lowLess common, but worth ruling out after the more likely causes.
Related help
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