Error code
OBD2 P0608
OBD2P0608
Diagnostic Trouble Code· Standard OBD-II fault code read from the vehicle's onboard diagnostics.
What it means
Control Module VSS Output 'A'.
Severity
moderateCan drive but may experience intermittent issues with systems relying on vehicle speed data.
Summary
P0608 indicates an issue with the Engine Control Module's Vehicle Speed Sensor (VSS) output 'A'. This problem affects systems that rely on vehicle speed data.
Symptoms
- Incorrect idle speed
- Poor transmission gear engagement
- Multiple warning lights and system malfunctions
Common Causes
- Harness and connector problems due to damage or corrosion
- Low system voltage, often caused by a weak battery
- Internal ECM fault, possibly from water damage or other issues
Diagnosis
- Check all fuses, junction boxes, and wiring harness for obvious faults
- Ensure ECM and other module connectors are properly seated
- Test the VSS circuit voltage to rule out low system voltage issues
Fixes
- Repair or replace damaged wiring harness
FAQ
What should I do if my speedometer works but P0608 is still present?
This could indicate an intermittent issue with the VSS circuit, such as poor electrical connections or corrosion.
Not affiliated with OBD2. Answer summarized from the manufacturer's manual linked above; consult that source for the authoritative procedure.
More OBD2 codes
- P0600Serial Communication Link
- P0601Internal Control Module Memory Check Sum Error
- P0602Control Module Programming Error
- P0603Internal Control Module Keep Alive Memory (KAM) Error
- P0604Internal Control Module Random Access Memory (RAM) Error
- P0605Internal Control Module Read Only Memory (ROM) Error
- P0606ECM/PCM Processor
- P0607Control Module Performance
- P0609Control Module VSS Output 'B'
- P0610Control Module Vehicle Options Error
- P0611Fuel Injector Control Module Performance
- P0612Fuel Injector Control Module Relay Control