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Home >> Mazda >> 2003 >> 6 s, Standard >> Repair and Diagnosis (Single Page) >> Engine Performance >> System >> Engine Controls [Self-Diagnostics 3.0L] >> Diagnostic Tests >> DTC P0052: Left Front Ho2S Heater Circuit - High Input >> Detection Condition
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Detection Condition

PCM monitors left front HO2S heater control signal at PCM 104-pin harness connector terminal No. 94. If PCM turns left front HO2S heater on but left front HO2S heater circuit has high voltage, PCM determines left front HO2S heater circuit has a malfunction. Left front HO2S heater is controlled by a duty signal. This is a Continuous Monitor (HO2S heater). 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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