P1444 — Ford — EVAP purge-flow sensor: signal too low

Definition from Ford’s 2012 nomenclature; applicability depends on the vehicle.

Affected system: EVAP emissions

Symptoms

• Check Engine light illuminated
• Noticeable fuel odor around the vehicle
• Reduced fuel efficiency
• Potential engine hesitation or rough idling

Possible causes

• Failed EVAP purge-flow sensor
• Open or shorted wiring in the sensor circuit
• Corroded electrical connectors
• Blockage in the purge line causing low flow reading
• Faulty EVAP purge valve

What to check

• Inspect the EVAP purge sensor wiring harness for damage or corrosion
• Check the electrical connector at the purge-flow sensor for secure seating
• Measure the reference voltage and ground circuit at the sensor connector
• Test the EVAP purge valve for proper operation and vacuum integrity
• Examine the vacuum and vapor lines for any clogs or debris
• Perform a voltage output test on the sensor while the purge valve is commanded open