Wheel Speed Sensor Front Left Circuit Open
The front left wheel speed sensor circuit has an open or disconnected condition.
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 computer looks for signals from the front left wheel speed sensor but isn't getting any because the circuit is broken or disconnected.
What the computer is actually seeing
The module expects a continuous electrical signal from the wheel speed sensor, typically around 0-12 volts as the wheel rotates, indicating speed. If the signal is absent due to an open circuit, it triggers this code.
What a healthy reading looks like
The expected voltage at the sensor should switch between 0 volts and around 12 volts as the wheel spins; no voltage indicates an open circuit.
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 wiring and connector for the front left wheel speed sensor for any visible damage or disconnection. If damaged, repair or replace as needed. Decision: Is the connector/wire intact? If yes, proceed to step 2. If no, fix the wiring/connectors.
- 22. Measure the voltage at the wheel speed sensor connector with the vehicle running. You should see a fluctuating voltage when the wheel turns. Decision: Is there voltage? If yes, proceed to step 3. If no, replace the wheel speed sensor as it may be faulty or further investigate the wiring.
- 33. Check the signal at the ABS module for the front left sensor using a scan tool. If there is no signal from the sensor reading, it's likely the ABS module is faulty. Decision: Is there a signal? If yes, the module might be faulty. If no, replace the wheel speed sensor.
Common causes
- Disconnected or damaged wheel speed sensor connector
- Broken wire in the sensor circuit
- Faulty wheel speed sensor
- Issues in the ABS module affecting communication
Typical repair cost
$$
Related codes
Frequently asked questions
Can I drive with this code?
Yes, but fix it soon as it affects ABS operation which can compromise braking performance.
Will this code come back?
If the underlying issue isn't fixed, yes, it will likely return.
Why does this code pair with other wheel speed sensor codes?
These codes often trigger together due to common issues in the wheel speed sensor circuit.
Working a real vehicle right now?
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