Wheel Speed Sensor Left Front Input Circuit Range/Performance Problem
This code indicates 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 is either not sending a signal, or the signal is out of range, indicating a problem with wheel speed readings.
What the computer is actually seeing
The vehicle's computer expects the left front wheel speed sensor to generate a voltage signal between 0.5 to 5 volts as the wheel turns, reflecting its speed. If the voltage deviates or drops out, this code will trigger.
What a healthy reading looks like
Sensor voltage should typically be between 0.5V (stationary) and 5V (speed increasing), and should match the speed of the vehicle as shown in the speedometer.
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 for any visible damage to the wiring or connector at the left front wheel speed sensor.
- 2Inspect for corrosion or loose connections at the sensor plug. Repair as necessary.
- 3Using a multimeter, check the voltage at the sensor connector with the ignition on and wheels spinning. Expect 0.5V to 5V range. If out of range, proceed to the next step.
- 4Test the sensor with a scan tool to monitor the wheel speed readings while the vehicle is moving. If readings are erratic or non-existent, replace the sensor.
- 5If sensor test is fine, check the vehicle speed sensor and ABS module for faults. Perform an appropriate diagnostic test.
Common causes
- Faulty left front wheel speed sensor
- Damaged wiring or connector to the sensor
- Corrosion at connector terminals
- Bad vehicle speed sensor reading due to ABS module faults
Typical repair cost
$$
Related codes
Frequently asked questions
Is it safe to drive with this code?
It is drivable but may affect traction control and antilock braking system performance, so get it fixed soon.
Will this code come back after clearing it?
If the underlying issue isn’t resolved, it is likely to return.
Why does this code pair with others like C1065?
Those codes often relate to different wheel speed sensors or performance issues that can occur simultaneously.
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