The computer sees a missing or wrong speed signal. The driver may notice a dead speedometer, odd shifting or cruise control not working.
Likely causes, most common first
- Faulty speed sensor
- Damaged wiring or connector
- Damaged sensor drive or tone ring
- Fault in a wheel speed signal on some cars
Parts usually involved
- Vehicle speed sensor
- Sensor connector
- Tone ring
Test before you replace
Read the speed signal live on a road test and compare it with the ABS wheel speed readings.
General guidance for generic OBD2 codes. Always follow the maker's procedure for the car in front of you.