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Mazda
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2002
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B4000 Base, Automatic
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Repair and Diagnosis
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Engine Performance
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System
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Engine Controls - Self-Diagnostics
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Diagnostic Tests
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DTC P0457: EVAP System Malfunction
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Possible Causes
Possible Causes
Possible causes are:
FTP circuit open.
FTP shorted to VREF or VPWR.
VREF shorted to VPWR.
SIG RTN circuit open.
Damaged FTP sensor.
Damaged PCM.