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Home >> Mazda >> 2003 >> MPV LX >> Repair and Diagnosis >> Engine Performance >> System >> Engine Controls - Self-Diagnostics >> Diagnostic Tests >> DTC P0138 Or DTC P0158 >> Detection Condition
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Detection Condition

DTC is set when rear HO2S signal voltage is more than .45 volt for 6 seconds during deceleration fuel cut. This is a continuous monitor. MIL illuminates if PCM detects malfunction in 2 consecutive drive cycles.