Vehicle Speed Sensor "A" Malfunction
The vehicle speed sensor (VSS) signal is missing or implausible. On automatic transmissions this often disables cruise control and shift adaptation; ABS-equipped cars typically derive speed from wheel speed sensors as a fallback.
Affected components
- Vehicle speed sensor
- Vehicle speed sensor wiring
Common causes
- High likelihood: Speed sensor failed
- Medium likelihood: Wiring or connector fault
Diagnostic notes
- The malfunction indicator lamp may illuminate
- This code can affect emissions
- A drive cycle may be required after repair
Sources
Diagnostic information is provided for reference only. Confirm the code with a compatible scan tool and follow the vehicle manufacturer's service procedures before replacing components.