Conditions for Setting the DTC
WARNING: This page is about a different car, the 2008 GMC Sierra and 2008 Chevrolet Silverado. However, it is still accessible from the selected car via links, so may be relevant.
P0050 or P0056
- The ECM detects that the affected HO2S heater low control circuit is not within a specified range at engine start-up.
- DTCs P0050 or P0056 set within one second when the above condition is met.
P0059
- The ECM detects that the affected HO2S heater low control circuit parameter is between 2.185-9.512 ohms at engine start-up.
- DTC P0059 sets within one second when the above condition is met.
P0060
- The ECM detects that the affected HO2S heater low control circuit parameter is between 4.119-10.810 ohms at engine start-up.
- DTC P0060 sets within one second when the above condition is met.
P0155
- The ECM detects that the HO2S 1 heater current parameter is more than 3.125 amps or less than 0.25 amp.
- DTC P0155 sets within 120 seconds during the heater current test when the above condition is met.
P0161
- The ECM detects that the HO2S 2 heater current parameter is more than 2.875 amps or less than 0.25 amp.
- DTC P0161 sets within 120 seconds during the heater current test when the above condition is met.