Conditions for Setting the DTC
WARNING: This page is about a different car, the 2007 GMC Sierra, 2007 GMC Cab & Chassis Sierra, 2007 Chevrolet Silverado, and 2007 Chevrolet Cab & Chassis Silverado. However, it is still accessible from the selected car via links, so may be relevant.
DTC P0050 or P0056
- The control module 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.
DTC P0059 or P0060
- The ECM detects that the affected HO2S heater low control circuit is not within a specified range at engine start-up.
- DTCs P0059 and P0060 set within one second when the above condition is met.
DTC P0155
- The control module detects that the HO2S 1 heater current parameter is more than 3.125 amps or less than 0.25 amp.
- DTC P0155 sets within 30 seconds during the heater current test when the above condition is met.
DTC P0161
- The control module detects that the HO2S 2 heater current parameter is more than 1.625 amps or less than 0.25 amp.
- DTC P0161 sets within 30 seconds during the heater current test when the above condition is met.