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Home >> Buick >> 2004 >> Century Custom >> Repair and Diagnosis >> Engine Performance >> System >> Engine Controls (DTC P0030 To P0138) >> Engine Controls Diagnosis >> DTC P0137 >> Conditions for Setting the DTC

Conditions for Setting the DTC

The PCM detects that the HO2S 2 signal voltage remains below 74 mV during Closed Loop operation for more than 2.5 minutes.

OR

The PCM detects that the HO2S 2 signal voltage remains below 550 mV during power enrichment (PE) mode for more than 16 seconds.

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