Safety Warning
DIY auto repair can cause serious injury, fire, or vehicle damage. These guides are for informational purposes only. Always follow OEM torque specs, wear PPE, and consult a certified mechanic if you are unsure. You are solely responsible for your safety.
DTC P0496: EVAP System High Purge Flow Detected
- Turn the ignition switch to ON (II).
- Clear the DTC with the HDS.
- Do the EVAP FUNCTION TEST in the INSPECTION MENU with the HDS.
Is the result OK?
YES -Intermittent failure, the system is OK at this time. Check for poor connections or loose terminals at the FTP sensor, the EVAP canister purge valve, the EVAP canister vent shut valve, and the PCM.
NO -If the EVAP FUNCTION TEST did not finish because of a DTC, do the indicated DTC's troubleshooting, then go to step 4.
- Turn the ignition switch to LOCK(0).
- Replace the EVAP canister purge valve (see EVAP CANISTER PURGE VALVE REPLACEMENT ).
- Turn the ignition switch to ON (II).
- Reset the PCM with the HDS.
- Do the PCM idle learn procedure (see PCM IDLE LEARN PROCEDURE ).
- Do the EVAP FUNCTION TEST in the INSPECTION MENU with the HDS.
Is the result OK?
YES -Troubleshooting is complete.
NO -Check for poor connections or loose terminals at the FTP sensor, the EVAP canister purge valve, the EVAP canister vent shut valve, and the PCM, then go to step 1.
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When to See a Mechanic
Stop DIY work and contact a certified mechanic immediately if any of the following apply:
- • You smell fuel, burning insulation, or see smoke.
- • Brakes feel soft, pull hard to one side, or make grinding noises.
- • The engine overheats, stalls repeatedly, or misfires under load.
- • You are missing required tools, torque specs, or safe lifting equipment.
- • You are not confident in the next step or safety outcome.