What The Sources Say About It
- Ford's test opens the canister purge valve to pull about 8 inches of water vacuum on the sealed system. (source)
- On Ford's test, a purge valve stuck closed sets P0455 and a leaking or stuck open purge valve sets P1450. (source)
- A leaking purge valve can build too much tank vacuum. Repeated cycles may crack the tank and cause a fuel leak or fuel odor (2010 to 2011 Fusion and Milan recall). (source)
- A stuck purge valve can stall the engine and deform a plastic tank, upsetting the fuel gauge (2012 to 2018 Focus recall). (source)
Codes That Point Here
P0441Evap Emission Control System Incorrect Purge FlowP0443Evap Emission System Purge Control Valve CircuitP0496Evaporative Emission (evap) System Flow During Non PurgeP0497Evap System Low Purge Flow, Stuck Closed
What It Costs
Published estimates put a purge valve at $210 to $251 at RepairPal. See every price row. For a real example of pricing the test before the part, see what a check engine diagnostic costs.
By Anthony Limpert, co-founder of Supercanic in San Jacinto, California, a shop with ASE certified mechanics. Updated November 12, 2026.
Author Source EEAT Authors · Anthony's Author Page
Sources For This Page
- 2009 MY OBD System Operation Summary for Hybrid Electric Vehicles (revised May 22, 2008), Ford Motor Company, read 2026-11-12
- Safety Recall 15S34 Supplement 1, 2010 to 2011 Fusion and Milan (January 20, 2016), Ford Motor Company (NHTSA 15V793), read 2026-11-12
- Safety Recall 18S32, 2012 to 2018 Focus 2.0L (October 25, 2018), Ford Motor Company (NHTSA 18V735), read 2026-11-12
- Purge Valve Replacement Cost Estimate, RepairPal, read 2026-11-12