Question about 2006 Toyota Highlander
P1135 is the A/F sensor Bank 1 Sensor 1. Unfortunately, it is the sensor on the back side of the motor, in the manifold against the firewall. Its extremely common, and its not very difficult to replace, just dont try doing it with the motor hot. If you installed an aftermarket sensor, or an Oxygen sensor instead of A/F, you will still have problems. old exhaust gaskets tend to crumble, dont worry, your air mix didnt cause that. Which sensor was replaced?
Posted on Feb 18, 2009
DTC P-1135 indicates that the heater portion of the Air-Fuel sensor either has an open or a short. This unit is not repairable; so you will need to replace it. The vehicle IS drivable with this code stored, as the heater simply "heats" the sensor, bringing it up to its operating temperature (640 degrees F.) Replace it with a Toyota part, "aftermarket sensors do not work well. Quite a common problem.
Posted on Sep 26, 2008
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Posted on Jan 02, 2017
That code is specific to the Air-Fuel Ratio (A/F) Sensor Heater Circuit Malfunction (Bank 1 Sensor 1)
P1135 Trouble Area:
Open or short in A/F sensor (bank 1, sensor 1)
A/F sensor (bank 1, sensor 1) heater
Posted on Jun 17, 2009
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