P1135 toyota 4runner. P1135 toyota description air fuel ratio afsensor need to reach a minimum operating temperature of 1200 degrees f to produce an accurate voltage signal. The airfuel sensor gets power from the airfuel relay located in the engine compartment junction box. P1130 toyota meaning the air fuel ratio af sensor varies its output voltage in proportion to the air fuel ratio.
A problem af sensor can trip this code and since p1135 is also coming up perhaps it really is an af sensor. The faster the air fuel ratio sensor reaches that temperature the faster the sensor will start sending an accurate signal to the engine control module. P1135 open or short in af sensor or heater problem bank 12 sensor 1.
The faster the air fuel ratio sensor reaches that temperature the faster the sensor will start sending an accurate signal to the engine control module ecm. Based on the output voltage the engine control module determines if the air fuel ratio is rich or lean and adjusts the stoichiometric air fuel ratiothe ecm also checks the fuel injection volume compensation value to check if the af sensor is deteriorating or not. Since this p1135 toyota code refers to the heater circuit thats where you should start your diagnosis.
The p0125 code can deceiving as the problem may have nothing to do with the coolant system. Causes of p1135 toyota rav 4 trouble code well use a 2002 toyota rav 4 in this example.