Conditions for Setting the DTC

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.