P0030 or P0036
WARNING: This page is about a different car, the 2009 GMC Sierra, 2009 GMC Cab & Chassis Sierra, 2009 Chevrolet Silverado, and 2009 Chevrolet Cab & Chassis Silverado. However, it is still accessible from the selected car via links, so may be relevant.
- The ECM detects that the affected HO2S heater low control circuit is not within a specified range.
- DTCs P0030 or P0036 set within 3 seconds when the above condition is met.