Oxygen Sensors

The oxygen sensor on a Honda Civic is replaced by disconnecting the wiring harness and removing the sensor using a socket wrench. Anti-seize paste is applied to the threads, a new sensor is torqued into place, and the wires reconnected.

The 1981 Ford Crown Victoria does not have an Oxygen sensor.

On a 1996 Mercury Cougar ( 3.8 litre V6 and 4.6 litre V8 engines )

Bank 1 is the passenger side of the engine

Sensor 2 is in the exhaust AFTER the exhaust has passed through the catalytic converter ( downstream sensor , also called catalyst monitor )

Could b an O2 sensor OR a Stuck open thermostat or one that's 2 cold-EVEN a clogged muffler or converter-many other things can cause your condition.

You were careful not to get any dirt on the hotwire/resistor in the sensor? I had a dead bug get on mine, and it didn't get burnt off like it was supposed to. This thing is very sensitive, so any debris on the wire will give you problems. You did plug in the IAT sensor, right? There is also a chance that you have the wrong MAF sensor.

behind the catalytic converter

natural

Bank one means the same side of the engine as the number one cylinder. Number 2 would be the second sensor on that side. usually this means that you could have 2 or more catalytic converters and that it could be after one of these.

Most oxygen sensors are either on the exaust headpipe just after the manifold or on the manifold. I don't know where it is exactly on the Lumina but that is where you should start looking.

passenger in front of cat but normally when one o2 sensor gos the other 3 are not far behind i would replace them all

You need to purchase the tool for removing the O2 sensor. It's a socket that has a slit down the side for the O2 sensor cable. This will cost you about 20-30$. The 02 sensor will un-screw with a socket wrench. Best done when car is cold. Otherwise you will burn your hands.

Good luck.

you have or should have two oxygen sensors on exhuast pipe. one before catalytic converter and one after it.depending on which engine you have you usually can see the one closest to engine from under hood.second one " SAFELY" jack up car and look just past catylitci converter should see it easily.

There are two and they are on the exhaust pipe. One in front of the catalytic converter (upstream) and one behind (downstream). Replacement is roughly equivalent to replacing a spark plug. Make sure to get the special socket that Autozone loans out.

Hey Bob==They are on the exhaust pipes.I don't know if it has one or two. GoodluckJoe

what year?

what motor 8v or 16v

the 8v has 1 , right on top of exh.manifold

the older (pre 96) has 1 at the exhaust collector.

the newer 96+ have 2 , but only the front one controls air fuel ratios.

the rear sender is only a CATCONVerter monitor.

my 96 with 5.7 ltr has 4 of them, 1 located by the exaughst manifold on each side, and also 1 located on each side by the converter

It is screwed into the exhaust manifold on the rear of the engine.

Same side as cylinder #1, third O2 sensor from the front.

Use a digital volt meter to determine the pin arrangement. On the new sensor, Two will be from the heater in the sensor. Set the meter to low OHMS and probe two wires at a time till you get 3.0-5.5 ohms(1.6l TFI engines) or 10.0-15.0 ohms in 1.6L MFI engines. That's the heating element circuit wires that will be connected to the voltage and ground from the ECM. The other wires are the sensor ground, and the sensor output.

This may help, my OEM O2 sensor pigtail is as follows-

blue=sensor ground

white=sensor output

blacks=+B (voltage from ECM) and Heater Ground, it should not matter which

With the key off, disconnect the O2 connnector from the harness near the firewall. Turn key to "on" position without starting car. Set volt meter to 10 or 20 volt DC range. ground black (-)neg. probe to engine and probe connector at the harnesss with the positive lead to find (+b) 12v from the ECM.

On the catalytic converter

It could DEFINITELY cause it, I am not saying that you can not modify your engine, Just keep in mind that an engine is an air pump, and The piston comes up to top dead center, (NOTICE THE USE OF THE WORD,DEAD) when the piston is down it has about as much volume as A drinking glass in the cylinder, When it is up, it has about as much as you would have in your mouth, NOT CAN HOLD, WOULD HAVE IN YOUR MOUTH WHEN DRINKING WATER,The TURBO CHARGER compresses the air BEFORE the engine gets it, So what would normally be equal to A GLASS of FUEL/AIR MIXTURE, Is now equal to A 2 liter bottle, When you "ADJUST" the pop off, Or really tighten it up, You do not let the EXCESS air escape before it hurts your engine, You definitely need to "READJUST" the pop off, at least A littly, KEEP IN MIND, you may have already broken rings, or piston, or bent rods, or blown headgasket, For your sake I hope not,REALLY GOOD LUCK, Jamison

Flames will come from the exhaust when raw gas enters the exhaust then ignites. run computer codes for the engine to look for a problem causing the gas to not burn completely.

Mine is located on the back side (towards firewall) on the exhaust manifold. In a very hard to reach spot. I can only get to mine from the underside of car.

No

The pre cat sensors are under the hood. Bank 1 Sensor 1 would be found between the engine and fire wall on the drivers side near the stearing knuckle. You need to open the hood to full verticle via the release on drivers side and then remove the engine cover.

The two post cat sensors are located on the exhaust under the car near the cat.

in the exhaust manifold and after the cat

Sensor 1 is the sensor before the cat. converter and bank 2 is the side of the engine Cylinder #2 is on. Not sure of your specific vehicle, but I have found this to be the general rule with sensor #'s and banks.