Evaporative Emission System Purge Flow Sensor Malfunction

What This Means

The purge flow sensor is not providing accurate readings of fuel vapor flow rate during EVAP system purge events.

Common Symptoms

Check engine light on
Possible fuel smell
No driveability issues
Failed emissions test

Common Causes

Loose or damaged gas cap
Cracked EVAP hose
Faulty purge/vent valve
Charcoal canister issue
Fuel tank pressure sensor failure

Estimated Repair Cost

$50 – $400

Parts and labor (varies by vehicle and location)

Difficulty:Moderate

Need This Fixed?

Find certified mechanics near you who can diagnose and repair P0445.

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For informational purposes only. Diagnostic trouble codes are starting points for diagnosis, not definitive answers. Always consult a certified mechanic for proper diagnosis and repair. Estimated costs vary by vehicle, location, and shop rates.