P0503moderate severityPowertrain
Vehicle Speed Sensor A Intermittent/Erratic/High
on 2002 Chevrolet Express 6.0L V8 Vortec · RWD
What this code means
Intermittent or erratic VSS signal.
Symptoms
- Erratic speedometer
- Random shifts
- Intermittent cruise issues
Common causes
- Loose connector
- Damaged wiring
- Worn tone ring
- Sensor going bad
Diagnostic steps
- Wiggle test connector
- Monitor signal stability
- Inspect tone ring
Repair notes
Repair connector or replace sensor.
Other Powertrain codes on this vehicle
P0001
Fuel Volume Regulator Control Circuit/Open
P0002
Fuel Volume Regulator Control Circuit Range/Performance
P0003
Fuel Volume Regulator Control Circuit Low
P0004
Fuel Volume Regulator Control Circuit High
P0010
Intake Camshaft Position Actuator Circuit/Open Bank 1
P0011
Intake Camshaft Position Timing Over-Advanced Bank 1
P0012
Intake Camshaft Position Timing Over-Retarded Bank 1
P0013
Exhaust Camshaft Position Actuator Circuit/Open Bank 1
P0014
Exhaust Camshaft Position Timing Over-Advanced Bank 1
P0015
Exhaust Camshaft Position Timing Over-Retarded Bank 1