Wheel Speed Sensor Front Left Input Circuit
Indicates a problem with the front left wheel speed sensor or its 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 front left wheel speed sensor sends signals about how fast that wheel is turning. If it's not working, the car won't know how fast it's going, which can affect braking and stability.
What the computer is actually seeing
The ABS system monitors the voltage and frequency of the wheel speed sensor. If the signal is too low or flat, or if no signal is detected for a certain period, it sets this code.
What a healthy reading looks like
The wheel speed sensor should output a voltage between 0.5 to 2.5 volts, depending on wheel rotation; the signal frequency should be within 200 to 400 Hz when the vehicle is in motion.
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 obvious wiring damage or corrosion at the wheel speed sensor connector.
- 2Measure the voltage at the wheel speed sensor connector with the key in the ON position—should be between 0.5 to 2.5 volts.
- 3If voltage is good, test the sensor by spinning the wheel and monitoring the signal frequency—should be between 200 to 400 Hz.
- 4If the sensor is not outputting a signal or voltage is incorrect, replace the wheel speed sensor.
- 5If the sensor works correctly, inspect wiring continuity from the sensor to the ABS module for opens or shorts.
Common causes
- Damaged wheel speed sensor
- Corroded connector terminals
- Open or shorted wiring in the sensor circuit
- Wheel bearing issues affecting sensor position
Typical repair cost
$$
Related codes
Frequently asked questions
Is it safe to drive with this code active?
It's not recommended, as it affects ABS functionality, increasing the risk of loss of control during braking.
Will this problem come back after fixing?
If the wiring and connections are properly repaired, it shouldn't return. Otherwise, check for other underlying issues.
Why does this code pair with others like C0715?
Multiple codes may indicate similar or related problems across different wheel speed sensors or circuits.
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