Conditions for Setting the DTC
WARNING: This page is about a different car, the 2008 Buick LaCrosse and 2008 Buick Allure. However, it is still accessible from the selected car via links, so may be relevant.
P0030 or P0036
- The ECM detects an open in the heater circuits of the HO2S when the heater is commanded OFF.
- The above condition exists for greater than 4 seconds.
P0031 or P0037
- The ECM detects a ground in the heater circuits of the HO2S when the heater is commanded OFF.
- The above condition exists for greater than 4 seconds.
P0032 or P0038
- The ECM detects a short to voltage in the heater circuits of the HO2S when the heater is commanded ON.
- The above condition exists for greater than 4 seconds.