Left Front Wheel Speed Sensor Circuit Failure
Indicates a failure in 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 is either not giving the right information or the circuit has a problem, which affects traction control and ABS.
What the computer is actually seeing
The ABS control module expects a signal varying between 0.5 to 5 volts from the left front wheel speed sensor depending on wheel speed and condition.
What a healthy reading looks like
Normal operation shows voltage fluctuations between 0.5V (stationary) to 5V (maximum speed), with signal frequency increasing proportionally with speed.
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 the left front wheel speed sensor connector for damage or corrosion. If found, repair or replace the connector.
- 2Inspect the wiring from the sensor to the ABS module for breaks or shorts. Repair any damaged wiring found.
- 3Using a multimeter, measure the voltage at the wheel speed sensor harness (key on, engine off). It should be between 0.5V and 5V. If not, sensor or wiring issue likely exists.
- 4If wiring and connector check out, replace the left front wheel speed sensor and clear the code.
Common causes
- Damaged or corroded wiring in the sensor circuit
- Faulty left front wheel speed sensor
- Loose or damaged connector at the sensor
- Wheel bearing issues affecting sensor position
Typical repair cost
$$
Related codes
Frequently asked questions
Is it safe to drive with this code?
You can drive the vehicle, but traction control and ABS will not function properly, which can compromise safety.
Will the code come back after clearing it?
It may return if the underlying issue isn't fixed, such as a faulty sensor or wiring problem.
Why might this code pair with C1231 or C1233?
These codes also indicate issues with other wheel speed sensors, suggesting a broader issue with the ABS system.
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