P0135 and P0155
WARNING: This page is about a different car, the 2009 Saturn Vue. However, it is still accessible from the selected car via links, so may be relevant.
- The ECM detects that the HO2S 1 heater element temperature is colder than a threshold for greater than 60 seconds after an auto-start.
OR
- The ECM detects that the HO2S 1 heater element temperature is colder than a predetermined value for greater 40 seconds.