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Code

P0496

Evaporative emissions

EVAP purge system flow during non-purge

Vapors flowed through the purge system when it should have been closed.

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Most likely causes

Purge valve stuck open
Faulty EVAP canister vent
Wiring fault

Symptoms you may notice

Check engine light
Fuel smell

Checks to run

Test the purge valve
Inspect the vent valve
Check wiring

Tools you may need

Multimeter OBD-II scanner

Always diagnose before replacing. Codes share symptoms; confirm the cause with measurements before buying parts.

Related codes in Evaporative emissions

Small leak in EVAP system

EVAP vent valve control circuit malfunction

Large leak in EVAP system

Very small leak in EVAP system

EVAP pressure sensor high input

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