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Home >> Oldsmobile >> 1987 >> Toronado >> Repair and Diagnosis (Single Page) >> Engine Performance >> System >> BCM Tests W/Codes (Part I) >> ECM Trouble Code Charts >> Code EO55, ECM Error

Code EO55, ECM Error

Replace Electronic Control Module (ECM). Clear all codes and confirm "closed loop" operation and no "Service Engine Soon" light.

NOTE: Continued on BCM SYSTEM, PART II.
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