Conditions for Setting the DTC: Notes
WARNING: This page is about a different car, the 2004 GMC Sierra, 2004 GMC Cab & Chassis Sierra, 2004 Chevrolet Silverado, and 2004 Chevrolet Cab & Chassis Silverado. However, it is still accessible from the selected car via links, so may be relevant.
Heater Current Test:
- The PCM detects that the affected HO2S Heater current parameter is more than 3.125 amps or less than 0.25 amps.
- The above condition is met for 10 seconds.