P144A on 2010-2012 Ford Fusion — Evaporative Emission System Purge Vapor Line Restricted/Blocked
1 vehicles · 1 makes · $100-$300 repair
Most Reported On
P144A is an OBD-II diagnostic trouble code meaning “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. This code is most commonly reported on 2010-2012 Ford Fusion, with repair costs ranging from $100 to $300.
Common Causes
Typical Repair Cost
Based on 1 documented vehicle-specific issues. Actual cost depends on root cause and vehicle.
Diagnostic Tools
P144A does not use the standard P/B/C/U prefix. It may be a manufacturer-specific code, so verify that a scanner supports your exact year, model and module before buying.
FAQ
What does P144A mean?
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.
What are the most common causes of P144A?
The most common causes of P144A are: 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. The specific cause varies by vehicle.
How much does it cost to fix P144A?
Repair costs for P144A range from $100 to $300, depending on the vehicle and root cause.
Which vehicles are affected by P144A?
Au7o has documented P144A across 1 vehicle models from 1 manufacturers: Ford.
Content compiled with AI assistance using NHTSA complaints, TSBs, and owner reports. May contain errors. Always verify with your vehicle's service manual.