Conditions for Setting the DTC

WARNING: This page is about a different car, the 2011 Cadillac DTS. However, it is still accessible from the selected car via links, so may be relevant.

P0134 or P0154

The ECM detects that the HO2S 1 voltage is between 350-550 mV as the throttle position (TP) indicated angle changes greater than 5 percent.
The DTCs set within 101 seconds when the above conditions are met.

P0140

The ECM detects that the HO2S 2 voltage is between 410-490 mV.
The throttle position has changed greater than 5 percent at least 5 times during the test.
The DTCs set within 101 seconds when the above conditions are met.