Vehicle Speed Sensor Signal Malfunction
This code 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 vehicle speed sensor measures how fast the car is moving. If it doesn't send the correct signal, the computer can't manage speed-related functions properly, like the transmission and speedometer.
What the computer is actually seeing
The PCM sees inconsistent, erratic, or no speed data from the speed sensor, which should normally provide a voltage signal between 0.5 to 4.5 volts corresponding to the vehicle speed.
What a healthy reading looks like
Normal vehicle speed readings should show between 0-200 km/h (0-124 mph) with corresponding voltage changes on the signal wire.
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. Inspect the wiring and connector to the speed sensor for corrosion, damage, or loose connections. Decision: If intact, proceed to step 2. If damaged, repair wiring/connectors.
- 22. Measure the voltage at the speed sensor connector with the ignition on. A normal sensor should output between 0.5 to 4.5 volts. Decision: If voltage is within range, proceed to step 3. If out of range, replace the sensor.
- 33. Check the sensor operation using a scan tool to monitor real-time speed data while the vehicle is in motion. Decision: If speed data is present and accurate, further diagnosis may be needed elsewhere (like transmission). If not, replace the speed sensor.
Common causes
- Wiring issues or connector problems to the speed sensor
- Faulty vehicle speed sensor
- Transmission issues affecting the signal output
- Software glitches in the vehicle's computer
Typical repair cost
$$
Related codes
Frequently asked questions
Is it safe to drive with this code?
It's drivable, but you may experience erratic speedometer readings and could cause transmission problems if not addressed soon.
Will this code come back after repairs?
If the issue is properly fixed, it should not return. Always clear codes and retest the system.
Why does this code sometimes pair with transmission codes?
Since the vehicle speed sensor affects transmission control, any malfunction can impact how the transmission shifts.
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