Oxygen Sensors

Screwed into the exhaust system. Start at the exhaust manifold and work your way backward toward the rear of the car, and you will find all the O2 sensors.

Bank 1 is the side of the engine that includes cylinder number 1, bank 2 would be the other side. Sensor one is before the cataylitc converter, sensor 2 would be after. BUT... IF one sensor has failed, you may as well replace the other at the same time. It will be going soon.

Selection criteria for sensors:

it depends on operating principal, sensitivity, range, accuracy, errors, stability and reliabilty, availability, cost, power consumption, environmental conditions,

.... Affy...

A cable harness, also known as a wire harness, cable assembly, wiring assembly or wiring loom, is a string of cables and/or wires which transmit informational signals or operating currents (energy).

Is there any other service that has to be done other than providing an O2 sensor for installation of 2 into 2 Vance Hines exhaust system?

This would be located near the engine. It allows for you to know when the engine is getting too hot or you need to take care of it.

there should be 4 two are pre cat and two are post cat

True, fire must have oxygen to burn.

Yes. There are organisms called anaerobic bacteria which do not need oxygen. To some organisms, called obligate anaerobes, oxygen is actually toxic. The first living things on Earth were obligate anaerobes.

yes you can

No it would not. You need to check the plug wires and the plugs. Depending on the year of the truck makes a difference, If it's a 2000 or newer it will have a coil for every cylinder, one of the coils could be brakeing down. Water in the fuel can cause your problem too. I would check these things first.

Bank 1 is the same side as cylinder #1.

Sensor 2 is after the catalytic converter.

There is one on each side of the catalytic converter.

Oxygen (A/F) Sensor Heater Control Circuit Low (Bank 1 Sensor 1)

symptoms
Other than the MIL light illuminating you may not notice any performance issues.

cause
A short in the O2 sensor heater circuit or the sensor itself
A faulty O2 sensor heater
Wiring or connectors are broken or frayed to the sensor or relay
Bad PCM or ECM

The fix
Correct wiring short or loose connector found in inspection.
and/or
Replace the bank 1 sensor 1 O2 sensor

Simply put, an oxygen sensor reacts to oxygen thus creating a voltage as high as 0.9v. The higher the voltage the richer the engine is running. Abnormally high voltage is caused by unburnt oxygen in the system (misfire), abnormally low voltage (vacuum leaks) is a system running with a lack of fuel. An engine running properly will show an upstream (sensor 1) O2 sensor switching from .1 to .9 volts as the computer hunts for the optimal mix or 14.7 parts of air to 1 part of fuel for gasoline engines. The downstream (sensor 2) should show a relatively stable, and lower voltage as these leftover combustion gases are scrubbed through a catalytic converter.
If an oxygen sensor fails, the computer will substitute the O2 signal with a predetermined value. Typically and over rich mixture will be used to protect the engine as damage can occur if running lean, however, prolonged rich mixture can damage the catalytic converter, which can be expensive to replace.
The oxygen sensor is a key component to a fuel injection system. Working in unison with other critical components such as engine coolant temp sensors, air flow sensors, throttle position sensors, these devices prolong engine life, increase fuel efficiency, reduce harmful emissions and have dramatically increased the reliability and ease of use of the modern day engine.

No.

you can breathe it

I think its the purple wire coming from the Oxygen sensor!

From what I know, some O2 sensors works on 0.7-3v? with a working current of 0-416uA.

So, if you can build a circuit that can put out those parameters your ECM will think you have a real O2 sensor.

The circuit I built does not replace the 02 sensor. When 12v power is applied to the circuit it switches the output from the sensor to ground with a relay, then sends 1.6v @ 6uA-415uA (Adjustable by potentiometer) in place of the 02 signal through the same relay.

I used diodes to supply the 1.6v. It might have been better to use an op-amp voltage regulator so that the output voltage remains factory for every application.

Note: I doubt all o2 sensors operate within the same specs. Know the specs of the unit you are working with, or know the range of all applicable values so you can select different values via switch.

Reguards - TT

Finding it is the hardest part (in my opinion). In other words, it's an easy job.

The FRONT oxygen sensors are at the exhaust manifold.

Notice where the exhaust manifold comes out of the engine, follow it down to where it all joins just before where it goes into the exhaust pipe. Somewhere near there you'll see a device that looks a little like a sparkplug and it will have a small wire going to it. That's the oxygen sensor.

Before removing the old sensor, get the new one and have it in your hand for inspection. Notice the wire coming out the top and compare it to the wire that comes out of the old oxygen sensor. Sometimes the replacement oxygen sensors have a longer wire and a plug, sometimes you have to "splice" them into the line.

If your replacement sensor has an electrical plug on it, make sure it matches the plug on your car.

If the replacement does NOT have an electrical plug or if the electrical plug doesn't match YOUR plug... you'll need to "splice" it into place, but the replacement kit should have the crimp connectors to help you there.

After you're satisfied that you have everything you need, remove the old sensor. You can purchase a special socket that has a slot for the wire to lay in. That's helpful when putting the new sensor back into place.

The old sensor should screw out, but it might be a little rusted in and you might need to fight it a little.

Put the new sensor in place, making sure that you remove the plastic protector first. Tighten it, splice the wires if necessary making sure that you connect the colors properly. If the colors on the wires aren't the same as your old unit the directions will tell you what to do.

Once it's screwed in and electrically connected, you're done.

Any tampering with an O2 sensor will cause a check engine light. So, you can not bypass.

The computer in your vehicle monitors several sensors and controls the function of the engine to produce the most power using the minimum fuel while producing as little emissions as possible.

The oxygen sensor monitors the exhaust to make certain that the engine is running properly. By checking the amount of oxygen in the exhaust, the engine can deliver more or less fuel to the intake. When the oxygen sensor(s) fail, the computer can only "guess" and reverts to a safe mode, which will not produce as much power and will definitely not give the best fuel economy. When running that way the vehicle will also produce more hydrocarbon and/or possibly other emissions.

Whenever the computer notifies you that your oxygen sensor has failed, replace it at once. That way you will avoid problems.

In any "V" configure engine (V6, V8, V10) there will be two oxygen sensors. It's best to replace them both at the same time.

The Downstream O2 sensor is faulty and needs to be replaced.