Wheel Speed Sensor Circuit Malfunction (Left Front)
There's an issue with the left front wheel speed sensor circuit.
Heads up: this code wasn't in our hand-written library yet, so DiagCoach AI built this page on the fly. Double-check critical specs against service info before condemning parts.
What it means (plain English)
The left front wheel speed sensor helps the computer monitor how fast the wheel is turning. If it fails, it can cause incorrect readings, which can affect the ABS and traction control systems.
What the computer is actually seeing
The ABS/traction control module expects a pulse signal from the left front wheel speed sensor, usually around 0-12 volts. It should see a certain frequency (measured in Hz) correlating to the wheel speed; for example, 1 Hz could equal roughly 5 mph.
What a healthy reading looks like
Voltage should be 0-12 volts, and frequency should be proportional to vehicle speed, e.g., 1 Hz = 5 mph.
Guided diagnostic — the DiagCoach way
Don't just throw parts at it. Walk through these in order — each step tells you whether to keep going or stop and fix what you found.
- 1Check wiring and connector integrity for damage or corrosion; look for loose connections.
- 2Test the wheel speed sensor resistance; it should be within manufacturer specs, usually around 1-2 kOhms.
- 3Check for proper voltage at the sensor's connector while the vehicle is running; expect around 5 volts at idle.
- 4If the sensor tests good, check the ABS module for faults; use a scan tool to pull codes. If this code alone appears, the module may be faulty.
Common causes
- Damaged wheel speed sensor
- Wiring issues or shorts in the circuit
- Bad ABS module
- Corrosion in the connectors
Typical repair cost
$$
Related codes
Frequently asked questions
Can I still drive the vehicle with this code present?
Yes, but the ABS and traction control may not function properly, impacting safety.
Will this issue come back after repairs?
If the repair is done correctly and the underlying problem is fixed, it shouldn't return.
Why does this code sometimes pair with other codes?
It's common for wheel speed sensor issues to affect the overall ABS system, triggering multiple related codes.
Working a real vehicle right now?
Let DiagCoach walk you through it live with your specific symptoms, vehicle, and what you've already checked.
Start guided diagnostic →