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• 19:04, 6 July 2026 Cliff talk contribs created page Code 52 (Created page with "'''Code 52''' is a diagnostic trouble code related to the ECM CALPAK on the Pontiac Fiero. Code 52 indicates that the ECM has detected a problem with the CALPAK, CALPAK installation, CALPAK connection, or related ECM backup-calibration function. == Overview == The CALPAK is a calibration package used by the ECM. It provides backup calibration information that allows the ECM to operate in a limited mode if certain ECM or PROM functi...")