Conditions for Setting the DTC
Rich Test
- The PCM detects that the HO2S 2 parameter is more than 1,000 mV.
- DTC P0138 sets within 100 seconds during the rich test when the above condition is met.
Decel Fuel Cutoff Test
- The PCM detects that the HO2S 2 parameter is more than 900 mV.
- DTC P0138 sets within 40 seconds during the decel fuel cutoff test when the above condition is met.