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Home >> Isuzu >> 1991 >> Trooper LS, 2D Utility, Automatic >> Repair and Diagnosis >> Engine Performance >> System >> Engine Controls - Tests W/Codes - 2.8L EFI >> Diagnostic Code Charts >> Code 55 - Faulty ECM

Code 55 - Faulty ECM

Replace ECM unit. Clear codes and confirm closed loop operation. See CLEARING TROUBLE CODES in this article. Ensure CHECK ENGINE light is off.

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