OBD-II FAULT CODE
P0468
Purge Flow Sensor Circuit High Input
Meaning, symptoms, likely causes, diagnostic checks and repair guidance for P0468.
- Check Engine light
- Poor drivability or reduced fuel economy depending on fault
- Fuel smell possible
- Usually little drivability change
- Loose/damaged fuel cap
- Cracked EVAP hose
- Faulty purge/vent valve
- Leaking canister
- High signal voltage
- Scan all modules and record freeze-frame data before clearing codes
- Check battery voltage and related fuses
- Check fuel cap seal first
- Smoke-test EVAP system
- Command purge/vent valves with scan tool if available
- Replace damaged cap/hoses, repair leaks, replace stuck purge or vent valve after testing
- Repair ground/signal circuit or replace confirmed faulty sensor
Related Codes
Need more help?
Search manuals, wiring diagrams and technical service bulletins.
Not sure what to do next?
Get step-by-step instructions and professional repair information.
Disclaimer: Information is provided for general guidance only and may not apply to all vehicles. Always consult a qualified technician.