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Diagnostic Trouble Code Identification
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DTC P0405: EGR Valve Drive Circuits Open Circuit
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Possible Causes
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Possible Causes
EGR valve power supply circuit open.
EGR valve to ECM drive circuit pair (EGR valve pins No. 1 and 4, 6 and 3), open or high resistance.
EGR valve failure (stepper motor open circuit).