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2018
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Grand Cherokee Altitude, 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 B1810 To P0117
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DTC Troubleshooting
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P0071-Ambient Air Temperature Sensor Performance
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Set Condition
Set Condition
After a calibrated amount of cool down time, the PCM compares the AAT, ECT, and IAT Sensor values. If the AAT Sensor value is not within 10°C (18°F) of the other temperature sensors, the AAT Sensor is declared as irrational.