Safety Warning
DIY auto repair can cause serious injury, fire, or vehicle damage. These guides are for informational purposes only. Always follow OEM torque specs, wear PPE, and consult a certified mechanic if you are unsure. You are solely responsible for your safety.
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HOMESERVICE MANUALSFORD2010FOCUS S, STANDARDREPAIR AND DIAGNOSIS (SINGLE PAGE)ENGINE PERFORMANCESYSTEMENGINE CONTROLS - POWERTRAIN DTC CHARTS & DESCRIPTIONS (EXCEPT DIESEL & HYBRID)DTC DIAGNOSISDTC P144C: EVAPORATIVE EMISSION SYSTEM PURGE CHECK VALVE PERFORMANCE
2010 Ford Focus S, Standard
DTC P144C: Evaporative Emission System Purge Check Valve Performance
2010 Ford Focus S, StandardSECTION DTC P144C: Evaporative Emission System Purge Check Valve Performance
DTC P144C: EVAPORATIVE EMISSION SYSTEM PURGE CHECK VALVE PERFORMANCE
| Description: | The powertrain control module (PCM) tests the EVAP canister purge check valve for a stuck open condition. The EVAP canister purge check valve test is performed during minimal boost conditions, once per drive cycle, when entry conditions are met. The DTC is set if the fuel tank pressure exceeds a calibrated amount within a specified amount of time during the test. | ||
| Possible Causes: |
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| Diagnostic Aids: | Install a new EVAP canister purge valve. Refer to the appropriate EVAPORATIVE EMISSIONS article . | ||
| Application | Key On Engine Off | Key On Engine Running | Continuous Memory |
| All | Refer to the Description, Possible Causes and Diagnostic Aids for the appropriate DTC. | ||
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When to See a Mechanic
Stop DIY work and contact a certified mechanic immediately if any of the following apply:
- • You smell fuel, burning insulation, or see smoke.
- • Brakes feel soft, pull hard to one side, or make grinding noises.
- • The engine overheats, stalls repeatedly, or misfires under load.
- • You are missing required tools, torque specs, or safe lifting equipment.
- • You are not confident in the next step or safety outcome.