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Home >> Isuzu >> 1990 >> Trooper LS, 2.8 R, Automatic >> Repair and Diagnosis >> Engine Performance >> System >> Engine Controls - Tests W/Codes - 2.8L >> Diagnostic Circuit Check >> Code 55: Faulty ECM

Code 55: Faulty ECM

Replace ECM unit. Clear codes and confirm "closed loop" operation and no "CHECK ENGINE" light.

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