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Home >> Fiat >> 2014 >> 500 Lounge, Automatic Trans >> Repair and Diagnosis >> Engine Performance >> Testing & Diagnosis >> 1.4L - I4 Non-Turbo - DTCS P0016-00 To P0354-00 - 500 & 500C >> Diagnosis And Testing >> P0138-00-O2 Sensor 1/2 Circuit High >> When Monitored

When Monitored

Continuously with the engine running and the O2 Sensor in closed loop mode.