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1990
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Lumina APV V6-191 3.1L
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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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Manufacturer Code Charts
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DTC 52
DTC 52
CODE 52 - CAL PAK ERROR FAULTY OR INCORRECT CAL PAK)
REPLACE ELECTRONIC CONTROL MODULE (ECM)
CLEAR ALL CODES AND CONFIRM "CLOSED LOOP" OPERATION AND NO "SERVICE ENGINE SOON" LIGHT