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.