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Home >> Mazda >> 2002 >> Tribute LX, 4WD >> Repair and Diagnosis >> External Pages >> Different car >> Section 61 (Engine Controls [Self-Diagnostics 3.0L]) >> Diagnostic Tests >> DTC P0446: Change Over Valve (EVAP System Leak Detection Pump) Stuck Closed >> Detection Condition

Detection Condition

WARNING: This page is about a different car, the 2003 Mazda 6. However, it is still accessible from the selected car via links, so may be relevant.

PCM monitors pump load current (EVAP line pressure), while evaporative leak monitor is operating. When decrease in pump load current is less than specification after reference current value has been obtained, PCM determines Change Over Valve (COV) in EVAP system leak detection pump has a malfunction. This is a Continuous Monitor (Evaporative). MIL illuminates if PCM detects malfunction condition in two consecutive drive cycles or in one drive cycle while DTC for same malfunction has been stored in PCM. PENDING CODE is available if PCM detects malfunction condition during first drive cycle. FREEZE FRAME DATA is available. DTC is stored in PCM memory.

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