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Detection Condition

WARNING: This page is about a different car, the 2003 Mazda MPV and 2002 Mazda MPV. However, it is still accessible from the selected car via links, so may be relevant.

PCM monitors control signal at terminal No. 93. If PCM turns off right front HO2S heater but circuit has low voltage, PCM determines HO2S heater circuit has malfunction. This is a continuous monitor. MIL is illuminated if PCM detects malfunction during 2 consecutive drive cycles. Right front HO2S heater is controlled by a duty signal.

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