P0036, P0037, and P0038
WARNING: This page is about a different car, the 2010 Chevrolet Cobalt. However, it is still accessible from the selected car via links, so may be relevant.
- The ECM detects that the difference between the expected and the actual HO2S 2 heater low control circuit voltage is more than a calibrated value.
- DTCs P0036, P0037, and P0038 set when the above condition is met for 4 seconds continuously, or for 30 seconds cumulatively.