Conditions for Setting the DTCs

P0137

• The ECM detects that the HO2S 2 signal voltage is less than 60 mV.
• The condition exists for less than 4 seconds.

P0137

• The ECM detects that the HO2S 2 signal voltage is greater than 1,050 mV.
• The condition exists for greater than 5 seconds.

P0140

• The ECM detects that the HO2S 2 voltage is between 400-520 mV for greater than 10 minutes.

  OR

• The ECM detects that the measured internal resistance of the HO2S is greater than 40,000 ohms, when the calculated exhaust temperature is greater than 600°C (1,112°F).