Wheel Speed Sensor Front Left Circuit Fault
Indicates an issue with the front left wheel speed sensor circuit.
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What it means (plain English)
When this code triggers, it means the computer is having trouble reading the speed of the front left wheel, which can affect braking and traction control systems.
What the computer is actually seeing
The ABS module monitors the voltage from the front left wheel speed sensor to determine if it's functioning correctly. If the voltage doesn't match expected signals, a fault code is triggered.
What a healthy reading looks like
The sensor should typically output a voltage signal between 0.5V and 2.5V while the vehicle is moving and around 0V when at rest.
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.
- 11. Inspect the front left wheel speed sensor and connector for physical damage or corrosion. Decision: If damaged, repair or replace as necessary.
- 22. Using a multimeter, check the voltage output from the wheel speed sensor. Expected: 0.5V-2.5V when moving. Decision: If out of range, replace the sensor.
- 33. Inspect wiring continuity between the sensor and ABS module. Look for shorts, opens or high resistance. Decision: If wiring is damaged, repair or replace it.
- 44. Clear the code and test drive the vehicle to see if the code returns. Decision: If the code comes back, re-evaluate sensor and wiring.
Common causes
- Faulty front left wheel speed sensor
- Damaged wiring or connectors in the sensor circuit
- Corrosion at connectors or sensor
- Incorrectly installed wheel bearings affecting sensor placement
Typical repair cost
$$
Related codes
Frequently asked questions
Is it safe to drive with this code?
It's moderate severity; you can drive but be aware of potential issues with ABS and traction control until repaired.
Will this code come back after clearing it?
If the underlying issue isn't fixed, yes, it will likely return.
Why does this code pair with other wheel speed codes?
They often share wiring or components, and a fault in one can affect readings for others.
Working a real vehicle right now?
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