FixVault
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Jeep
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2015
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Grand Cherokee Laredo, AWD
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Repair and Diagnosis
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Engine Performance
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System
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3.6L - DTCS P000A To P0159
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DTC Troubleshooting
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P0138-O2 Sensor 1/2 Circuit High
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Set Condition
Set Condition
The Powertrain Control Module (PCM) detects that the Oxygen Sensor 1/2 voltage is greater than the maximum acceptable value for a specific amount of time, based on Oxygen Sensor 1/2 Heater temperature.