Speed Sensor (SS) Malfunction
Indicates a problem with the vehicle speed sensor signal.
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 speed sensor measures how fast the vehicle is going. If it fails, the engine computer might not get any info on speed, which can affect how the engine runs.
What the computer is actually seeing
The computer looks for a consistent speed signal typically between 0 and 12 volts. If it sees less than 0.5 volts or more than 12 volts, or if the signal is absent for a set amount of time, it triggers this code.
What a healthy reading looks like
The speed sensor should produce a sine wave signal fluctuating between 0 and 5 volts as the vehicle moves, with at least 1 pulse per second when 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 the wiring and connectors for the speed sensor for damage or corrosion.
- 2Test the speed sensor output with a multimeter. You should see a signal voltage between 0 and 5 volts when the vehicle is in motion.
- 3Inspect the vehicle's ECU for any recent repairs or updates that may have affected sensor inputs.
- 4If the wiring and sensor are good, connect a scan tool and see if there are any related codes indicating transmission issues.
Common causes
- Bad speed sensor
- Wiring or connector issues
- Faulty engine control unit (ECU)
- Transmission problems affecting the sensor
Typical repair cost
$$
Related codes
Frequently asked questions
Is it safe to drive with this code?
It's recommended to address this quickly, as it can lead to shifting issues and affect drivability.
Will this code come back after clearing?
If the underlying issue isn't fixed, the code will likely return after clearing and driving.
Why does it pair with transmission codes?
The speed sensor is closely tied to the transmission. If there's a malfunction, the ECU can't manage transmission shifts effectively.
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