Rear Axle Speed Sensor Circuit
Issue with the rear axle 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 rear axle speed sensor measures how fast the rear wheels are turning. If there's a problem, you might not get accurate readings for things like stability control or ABS.
What the computer is actually seeing
The ECM expects a voltage signal from the rear axle speed sensor, typically between 0.5 to 5 volts, which fluctuates based on wheel speed.
What a healthy reading looks like
Voltage signal should oscillate between 0.5V at rest to around 5V at maximum speed, with a rhythm that matches the wheel 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.
- 1Inspect wiring and connectors for damage or corrosion; check for physical issues with the speed sensor.
- 2Check for the proper voltage at the rear axle speed sensor connector; a reading below 0.5V or constant voltage indicates a potential fault.
- 3Verify sensor operation by raising the vehicle and spinning the rear wheels; the voltage signal should vary appropriately on a multimeter or scan tool.
Common causes
- Damaged wiring in the sensor circuit
- Faulty rear axle speed sensor
- Corrosion in connectors
- Poor ground connections
Typical repair cost
$$
Related codes
Frequently asked questions
Is it safe to drive with this code?
Yes, it's drivable, but you may experience issues with stability control and ABS performance.
Will this code come back after clearing?
If the issue isn't resolved, it will likely return after some driving.
Why does this code pair with other speed sensor codes?
Different sensors may be interconnected; an issue in one sensor or circuit can affect others.
Working a real vehicle right now?
Let DiagCoach walk you through it live with your specific symptoms, vehicle, and what you've already checked.
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