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Home >> Cadillac >> 2004 >> CTS Base, 3.2 N >> Repair and Diagnosis >> External Pages >> Different variant/trim >> Section 26 (Engine Controls - 5.7L - Diagnosis (DTC P0068 - P0174)) >> Diagnosis >> DTC P0138 or P0158 >> Conditions for Setting the DTC >> Rich Test

Rich Test

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The PCM detects that the affected HO2S voltage parameter is more than 950 mV for 200 seconds.

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