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Jaguar
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2003
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XJ8 Base
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Repair and Diagnosis
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Engine Performance
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System
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Engine Controls - Self-Diagnostics
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Diagnostic Trouble Code Identification
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DTC P0406: EGR Valve Drive Circuit Short Circuit
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Possible Causes
Possible Causes
EGR valve to ECM drive circuit pair (EGR valve pins No. 1 and 4, 6 and 3), shorted to ground or high voltage.
EGR valve failure (stepper motor short circuit).