Mike's Workshop Manuals
: Service manuals for every vehicle
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Jeep
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2021
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Grand Cherokee Laredo X, AWD, Automatic T/Case Control
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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 P0440 To P0481
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DTC Troubleshooting
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P0440-General EVAP System Failure
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Set Condition
Set Condition
The Powertrain Control Module (PCM) initiates an intrusive test to determine the leak size. This DTCs sets when the ESIM Switch did not close during the test period.