Error code
OBD2 P0500
OBD2P0500
Diagnostic Trouble Code· Standard OBD-II fault code read from the vehicle's onboard diagnostics.
What it means
Vehicle Speed Sensor 'A'.
Severity
moderateCan drive, but may experience shift issues and poor performance.
Summary
P0500 indicates a malfunction in the Vehicle Speed Sensor (VSS) circuit or sensor itself, which is crucial for determining vehicle speed and controlling various systems like transmission shifts and EGR function.
Symptoms
- Shift problems
- Engine performance issues
- Improper speedometer readings
Common Causes
- Failed VSS sensor
- Fault in the VSS circuit
- Problem with the PCM
Diagnosis
- Perform a visual inspection of the sensor and connection.
- Check the VSS with a scan tool to verify speed readings match actual driving conditions.
- Test the sensor output using an ohmmeter or oscilloscope depending on the type (reed switch, permanent magnet, Hall Effect).
- Inspect the circuit for continuity issues.
Fixes
- Replace faulty VSS sensor if identified as the cause.
FAQ
How do I test a reed switch VSS?
Rotate the speedometer cable or wheel and use an ohmmeter to check for circuit opening and closing.
What should I look for when testing a permanent magnet sensor?
Measure resistance between 190-250 ohms, rotate wheels while monitoring readings with an ohmmeter or AC voltage meter.
Not affiliated with OBD2. Answer summarized from the manufacturer's manual linked above; consult that source for the authoritative procedure.
More OBD2 codes
- P0501Vehicle Speed Sensor 'A' Range/Performance
- P0502Vehicle Speed Sensor 'A' Circuit Low Input
- P0503Vehicle Speed Sensor 'A' Intermittent/Erratic/High
- P0504Brake Switch 'A'/'B' Correlation
- P0505Idle Air Control System
- P0506Idle Air Control System RPM Lower Than Expected
- P0507Idle Air Control System RPM Higher Than Expected
- P0508Idle Air Control System Circuit Low
- P0509Idle Air Control System Circuit High
- P0510Closed Throttle Position Switch
- P0511Idle Air Control Circuit
- P0512Starter Request Circuit