It is the one on the passenger side behind the catalytic converter
Heated oxygen sensor heater circuit malfunction (bank 1, sensor 1): Open or short in heated oxygen sensor heater circuit Heated oxygen sensor heater malfunction (Haynes Repair Manual)
The air fuel sensor heater circuit is also known as a Oxygen Sensor. It's main purpose is to detect the amount of oxygen in the exhaust gas compared to the outside level of oxygen.
The Sequoia has four oxygen sensors, two on each side. The ones in front of catalytic are pos 1 and after are pos 2. Bank 2 is on passenger side, Bank 1 is on the driver's side.
The P1135 is set when the Engine Control Module detects a heated oxygen sensor heater circuit malfunction. This could be caused by a faulty air-fuel ratio sensor or a faulty engine control module.
Newer oxygen sensors are heated for accuracy. If the heater element goes bad the oxygen sensor doesn't work and needs to be replaced. If you have an oxygen sensor heater malfunction, it just means that the oxygen sensor has failed.
The oxygen sensor is "done". It should be replaced.
I just got a quot for a 2003 Sequoia and they said it will be $490 parts and labor. Part $290 Labor $200.
P0060 - heated oxygen sensor bank2 sensor 2 heater resistance p0062 - heated oxygen sensor bank2 heater control circuit
02 Sensor Heater Control Circuit Low (Bank 2 Sensor 1) Shorted condition detected in the oxygen sensor heater element control feedback sense circuit
post -converter oxygen senser heater or circuit fault
P0135 on Mitsubishi galant 2003 Definition: HO2S 11 Heater condition (Heated Oxygen Sensor Bank 1 Sensor 1) Explanation: The powertrain control module monitors the oxygen sensor heater. The computer has recognized a failure in this ciricuit. Probable Causes 1. -Oxygen sensor defective 2. -Poor connection at oxygen sensor 3. -Check circuit-fuse
THE HEATER CIRCUIT IS PART OF THE OXYGEN CENSOR TWO OF THE WIRES HEAT THE CENSOR. JUST REPLACE THE CENSORS THAT SHOULD BE EASY.