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1987
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Riviera V6-231 3.8L
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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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E052
E052
A Code E052 indicates poor CALPAK contact (bent or missing pins) or an inoperative or missing CALPAK.
Clear all codes and confirm "Closed Loop" operation and No "Service Engine Soon" Light.