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Home >> Mazda >> 2003 >> MPV ES >> Repair and Diagnosis >> Engine Performance >> System >> Engine Controls - Self-Diagnostics >> Diagnostic Tests >> DTC P0446: EVAP System Vent Control - Malfunction >> Detection Condition
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Detection Condition

PCM monitors EVAP leak detection pump load current while evaporative leak monitor is operating. If decrease in pump load current is less than specification after reference current value is obtained, PCM determines Change Over Valve (COV) malfunction and DTC is set. This is an intermittent monitor. MIL illuminates if PCM detects malfunction in 2 consecutive drive cycles.

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