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Home >> Mercury >> 1993 >> Sable LS, 4D Sedan, 3.8 4, AXODE >> Repair and Diagnosis >> Engine Performance >> System >> Engine Controls - Tests W/Codes - EEC-IV >> Circuit Tests >> Circuit Test Ha - Adaptive Fuel Strategy >> Code 188

Code 188

Indicates left or front HO2S detected a problem and adaptive fuel lean limit has been reached.