Wheel Speed Sensor Fault – Left Front
There's a problem with the left front wheel speed sensor or 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 computer is getting an incorrect speed reading from the left front wheel sensor, which helps control systems like ABS and traction control.
What the computer is actually seeing
The wheel speed sensor for the left front wheel is producing a signal that is out of the expected range, typically between 0 to 5 volts. It might report no signal (0 volts) or a signal that is erratic or too high.
What a healthy reading looks like
Normal operation sees a voltage oscillating between 0 and 5 volts as the wheel turns; at a steady speed, it should output roughly 2.5 volts.
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 left front wheel speed sensor wiring and connector for damage or corrosion. Repair if needed. Decision Point: Is wiring intact? (Yes: go to step 2; No: repair wiring and retest)
- 22. Check the sensor resistance with a multimeter. Expected resistance is typically between 1k to 5k ohms. Decision Point: Is resistance within range? (Yes: go to step 3; No: replace the sensor and retest)
- 33. Measure voltage at the sensor while the wheel is being turned. Expected value is between 0-5 volts. Decision Point: Is voltage correct? (Yes: possible PCM issue; No: replace the sensor or check wiring continuity)
Common causes
- Damaged wheel speed sensor
- Loose or corroded connector
- Broken wiring in the sensor circuit
- Wheel bearing failure affecting sensor position
Typical repair cost
$$
Related codes
Frequently asked questions
Is it safe to drive with this code?
It's advisable to fix this soon as it can affect braking performance and stability.
Will the code come back after clearing?
If the underlying issue isn't fixed, yes, the code is likely to reappear.
Why does it sometimes pair with C1441?
C1441 is for the right front wheel sensor fault, which can relate to similar wiring or circuit issues.
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