Conditions for Setting the DTC: P0138
WARNING: This page is about a different car, the 2010 Chevrolet Cobalt. However, it is still accessible from the selected car via links, so may be relevant.
- The ECM detects that the HO2S 2 voltage parameter is more than 1,150 mV.
- DTC P0138 sets within 5 seconds when the above condition is met.