LEMON Manuals
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Gladiator Nighthawk, Part Time T/Case Control, Automatic Trans
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Repair and Diagnosis (Single Page)
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Engine Performance
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Testing & Diagnosis
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3.6L (GPEC 2A) - DTCS P0138 To P0158
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DTC Troubleshooting
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P0140-O2 Sensor 1/2 No Activity Detected
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Set Condition
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Set Condition
The Oxygen Sensor 1/2 signal switches from lean to rich less than 16 times within 20 seconds during monitoring.