Wheel Speed Sensor Malfunction - Left Front
This code indicates a problem with the left front wheel speed sensor.
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 vehicle's computer isn't getting the correct data from the left front wheel speed sensor, which helps control systems like ABS and traction control.
What the computer is actually seeing
The ABS control module expects a signal indicating the speed of the left front wheel. When it doesn't receive this signal or it detects a value outside typical parameters, it triggers the C1287 code.
What a healthy reading looks like
The wheel speed sensor should produce a voltage between 0.5V to 1.5V at stationary, increasing as the wheel turns.
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 wiring and connector at the left front wheel speed sensor for damage or corrosion.
- 2Inspect the reluctor ring for cleanliness and proper attachment; it should not be damaged or missing teeth.
- 3Test the left front wheel speed sensor output with a multimeter while spinning the wheel; expect a varying voltage output as the wheel turns.
- 4If the sensor is in-spec, run a scan tool to check for other ABS-related codes, especially C1286 or C1288; address those if present.
Common causes
- Wiring or connector issue to the left front wheel speed sensor
- Faulty left front wheel speed sensor
- Dirty or damaged reluctor ring on left front wheel
- Malfunction in ABS module
Typical repair cost
$$
Related codes
Frequently asked questions
Is it safe to drive with this code?
It can be safe to drive, but loss of ABS or traction control may occur; fix it soon to ensure optimal braking performance.
Will this code come back after clearing?
If there is a persistent fault, the code will return after clearing. Address the underlying issue first.
Why does this code appear with other wheel speed codes?
Multiple codes often point to a systemic problem in the ABS system or shared components, and they should be diagnosed together.
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