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Originally Posted by sinewbi
my 02 sienna has same code(p1135),but i don't know where is b1s1 o2 senser located, please help
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Bank 1 is the bank closest to the firewall . Bank 1 denotes the bank with cylinder #1 in it. Sensor 1 is the first sensor in front of the CAT.
Attached is a document that may help you see which is which.
Hurley Chuck
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How do you test the heater circuit of bank 1/sensor1 to be sure wheter its the heater or the sensor. I also have the P1135 cdode at 66000 mile on my v6 tundra
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see attachment