How does a heated O2 sensor work?
The O2 sensor works like a miniature generator and produces its own voltage when it gets hot. The difference in oxygen levels between the exhaust and outside air within the sensor causes voltage to flow through the ceramic bulb. The greater the difference, the higher the voltage reading.
Where is Bank 2 on an oxygen sensor?
Typically located opposite of Bank 1, Bank 2 refers to the side of the engine that holds the number two cylinder. To ensure that the oxygen sensors operate at the right time, the PCM tests the heater circuits regularly.
Which is the oxygen sensor on a V-type engine?
On V-type engines one sensor will be referred to as Bank I Sensor 1 and the other as Bank 2 Sensor 1. The oxygen sensor after the catalytic converter is used by the ECM primarily to determine catalytic converter efficiency. This sensor is refer-red to as sensor 2.
Where is the O2 sensor located on a car?
Sensor 1 is the heated O2 sensor unit located upstream of the catalytic converters. It determines if the component is breaking down the pollutants generated by the engine by monitoring the oxygen levels in the converter’s exhaust. Typically located opposite of Bank 1, Bank 2 refers to the side of the engine that holds the number two cylinder.
How does the heater on the oxygen sensor work?
A PTC element inside the oxygen sensor heats up as current passes through it. The ECM turns on the circuit based on engine coolant temperature and engine load (determined from the MAF or MAP sensor signal). This heater circuit uses approximately 2 amperes. The heater element resistance can be checked with a DVOM.
Where is the bank 1 air fuel ratio sensor?
The error code was P1135 for Bank 1 Sensor 1 Air Fuel Ratio Sensor. Of course, this is the most difficult sensor to reach (arrg!). It is in the exhaust manifold on the back side of the engine just in front of the firewall. You can only really reach it with one arm by coming in from the top of the engine on the driver’s side down by the firewall.
Typically located opposite of Bank 1, Bank 2 refers to the side of the engine that holds the number two cylinder. To ensure that the oxygen sensors operate at the right time, the PCM tests the heater circuits regularly.
How does a wideband O2 sensor work?
Wideband/Air-Fuel sensors perform the same function as a regular O2 sensor, but they precisely measure the amount oxygen in the exhaust rather than just switching between rich (too much fuel, not enough oxygen) and lean (too much oxygen, not enough fuel).
How to check and replace an oxygen sensor ( air )?
A P1155 or P1135 code indicates you have a bad sensor. This is common in Toyota and Lexus cars and trucks. Learn how to test the air fuel ratio sensor to see if it is bad, and then learn how to replace the bad sensor. Nice O2 Sensor Socket Kit: http://www.amazon.com/gp/product/B005…