Vehicle Speed Sensor (VSS) Signal Missing
The vehicle's speed sensor is not sending a signal to the control module.
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 speed sensor measures how fast the wheels are turning. If it stops working, the computer can't tell how fast you're going, which can mess up things like your speedometer and ABS.
What the computer is actually seeing
The computer expects a consistent signal from the speed sensor, typically a voltage pulse correlating to wheel rotation. If no signal or an inconsistent signal is received, the code is set.
What a healthy reading looks like
Signal should pulse from 0.5 to 12 volts, roughly 2 to 3 pulses per wheel revolution at speeds above 5 mph.
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. Check the vehicle speed sensor wiring for damage, frays, or corrosion. Repair or replace as needed.
- 22. Verify the connector is secure and free of corrosion or debris. Reconnect or clean if necessary.
- 33. Use a multimeter to test the output of the speed sensor: should pulse between 0.5 to 12 volts with vehicle movement. If not, replace the sensor.
- 44. Check for any related DTCs; if others are present, diagnose them first as they may affect the speed sensor's operation.
- 55. Ensure the vehicle’s ground connections are solid; poor grounding can cause faulty signals. Clean and repair grounds if needed.
Common causes
- Faulty vehicle speed sensor
- Wiring issues or broken connectors
- Poor ground connection
- Faulty ABS module or control module
Typical repair cost
$$
Related codes
Frequently asked questions
Can I still drive the vehicle with this code?
Yes, but it's not recommended. Your speedometer may not work, and ABS features could be disabled, compromising safety.
Will this problem come back after clearing the code?
If the underlying issue isn't fixed, the code will likely return. Always diagnose and repair the root cause.
Why does this code appear when I have issues with my ABS?
The speed sensor input is crucial for ABS function; if the computer doesn't receive a proper signal, it affects ABS operation.
Working a real vehicle right now?
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