Mike's Workshop Manuals
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2018
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Wrangler JK Rubicon, Automatic Trans
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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 P0155 To P0455
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DTC Troubleshooting
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P0440-General EVAP System Failure
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Set Condition
Set Condition
The Evap system was unable to achieve or maintain vacuum during the test period or the system was not able to close the ESIM Switch when vacuum was present.