B4000 SE Cab Plus 4WD V6-4.0L OHV (1997)
Purge Flow Sensor: Description and Operation
PURGE FLOW SENSOR
Monitors vapor flow through EVAP solenoid and sends signal to PCM. PCM sends output signal to solenoid based on flow conditions.
NOTE:
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If the purge flow sensor circuit has an open or short, Diagnostic Trouble Code No. P1444 or P1445 is output.
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If the purge flow sensor circuit is open or shorted, no driveability symptom will be noticed.
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If purge flow is malfunctioning, DTC No. P1443 is output.