Powertrain
generic / SAE
P0502
Vehicle Speed Sensor A Circuit Low
The primary vehicle speed sensor (VSS A) reports a signal voltage below the plausible lower limit. With no usable speed signal the ECU loses cruise control, gear-shift logic and certain anti-stall functions.
SystemPowertrain
Typegeneric / SAE
GroupP0
Range / number5 / 02
Possible causes
- Signal shorted to ground high
- Sensor internal short medium
- Connector pins corroded - high contact resistance low
Inspection / repair
- Difficulty: easy
- DIY: possible
- Estimated cost: 80–280 €
- Estimated time: 0.4–1.4 h
- Component: vehicle speed sensor a
- Component: vss wiring
- MIL / check engine light
Sources
References
sae:J2012