P144A on Ford
Evaporative Emission System Purge Vapor Line Restricted/Blocked
P144A on Ford vehicles indicates evaporative emission system purge vapor line restricted/blocked. Au7o has documented this code across 1 Ford model — most commonly on Fusion. Manufacturer-specific code used by Ford. During the EVAP monitor the powertrain control module closes the canister vent valve and watches how quickly vacuum builds in the fuel tank and vapor lines via the fuel tank pressure sensor. If vacuum rises faster than expected, the PCM concludes the purge vapor line between the charcoal canister and the engine is restricted or blocked and sets this code. The car normally drives fine, but the check engine light stays on and the vehicle will fail an emissions test. EVAP work involves live fuel vapor, so this is generally a shop job rather than a driveway repair. Typical repair costs on Ford range from $100 to $300, depending on the specific model and root cause.
Common Causes of P144A
- •Kinked, crushed, pinched, or misrouted purge vapor line (often after prior service or collision repair)
- •Degraded charcoal canister shedding carbon granules that clog the purge line
- •Debris, ice, or moisture restricting the vapor line or canister outlet
- •Purge valve stuck closed or restricted at its inlet
- •Canister saturated with liquid fuel from repeated topping-off at the pump
- •Fuel tank pressure sensor reporting inaccurate values, mimicking a restriction
P144A on Ford by Model
Ford Fusion(1 issue)
- EVAP Purge Valve Stuck/Leaking - Check Engine Light and Rough Running2010-2012
The under-hood evaporative-emissions purge valve on 2010-2011 Fusion/Milan (2.5L DOHC and 3.0L) built on or before 3/4/2011 can stick open or leak, unmetered vapor entering the intake. This lights the MIL and sets a cluster of EVAP and lean/fuel-trim codes, and can cause rough idle or hard starts. It is a documented Ford pattern failure with a related TSB covering the affected build range.
Looking for P144A on a different make?
View P144A across all makes →Frequently Asked Questions
What does P144A mean on Ford?▼
P144A stands for "Evaporative Emission System Purge Vapor Line Restricted/Blocked." Manufacturer-specific code used by Ford. During the EVAP monitor the powertrain control module closes the canister vent valve and watches how quickly vacuum builds in the fuel tank and vapor lines via the fuel tank pressure sensor. If vacuum rises faster than expected, the PCM concludes the purge vapor line between the charcoal canister and the engine is restricted or blocked and sets this code. The car normally drives fine, but the check engine light stays on and the vehicle will fail an emissions test. EVAP work involves live fuel vapor, so this is generally a shop job rather than a driveway repair. On Ford specifically, this code is documented across 1 model.
What causes P144A on Ford vehicles?▼
Common causes on Ford: Kinked, crushed, pinched, or misrouted purge vapor line (often after prior service or collision repair), Degraded charcoal canister shedding carbon granules that clog the purge line, Debris, ice, or moisture restricting the vapor line or canister outlet, Purge valve stuck closed or restricted at its inlet, Canister saturated with liquid fuel from repeated topping-off at the pump. Specific causes vary by model and year — see the per-model sections below.
How much does it cost to fix P144A on a Ford?▼
Repair costs on Ford range from $100 to $300, depending on the specific model and root cause.
Which Ford models have P144A documented?▼
Au7o has documented P144A on 1 Ford model: Fusion.