Where is Bank 1, the firewall side or the radiatior side on a 3.0 liter V6 Highlander
Bank 1 for what sensor/system?
Bank 1 sensor 1 P0-135 oxygen sensor - O2 heater sensor ciruit does not work. Where is the sensor located?
I believe it is the radiator side, however, you may also need to look at the ones down near the catalytic convertor. Unplug each one individually and see if any new codes appear.
Bank 1 is the rear engine bank. uncsrewing any sensor will throw a code. Could also be dirty MAF or air filter, test the sensor with a proper scanner to confirm operation and check mass air flow to confirm.
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