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Land Rover
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1996
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Discovery I (LJ) V8-4.0L
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Repair and Diagnosis
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A L L Diagnostic Trouble Codes ( DTC )
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Testing and Inspection
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Diagnostic Trouble Code Descriptions
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P Code Charts
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P1621
P1621
DTC P1621
Communications with the security ECM has not happened within the expected time (Driving Cycle A)