Conditions for Setting the DTC

Heater Current Test

• The PCM detects that the HO2S 1 Heater Current parameter is more than 1.7 amps or less than 0.301 amps.
• DTC P0135 sets during the heater current test within 60 seconds when the above condition is met.

Heater Resistance Test

• The PCM detects that the HO2S 1 heater calculated resistance is not within the expected range at engine start-up.
• DTC P0135 sets during the heater resistance test within 5 seconds when the above condition is met.