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Home › Chevrolet › 2005 › Classic › Repair and Diagnosis › Engine Performance › System › Engine Control System (DTC P0106-P0300) › Diagnosis › DTC P0138 › Conditions for Setting the DTC

Conditions for Setting the DTC

The PCM detects that the HO2S 2 parameter is more than 1,042 mV.
DTC P0138 sets within 50 seconds when the above condition is met.