I have a 2002 chryler concord, the check engine light comes, it says oxygen sensor, I replaced it, still have?

Question

the oxygen on bank 1, sensor 2 , says it is still bad. any help.

Answer 1

did you replace the correct sensor? it would be the right bank downstream sensor, underneath the car after the catalytic convertor. on the 2.7, 3.2, and 3.5 the #1 bank is on the right side, most pelople think it is the left side. what code is it? is it a heater dircuit, o2 stays lean, center, rich? is it sensor circuit? there are many codes for each sensor that mean different things. if you replaced the right sensor the light should go off after 3 drive cycles if that was what was wrong. depending on what code you have, an exhaust leak, or an internal engine coolant leak or burning oil could also set an 02 code.

Answer 2

I have the exact same problem. Error code was P0158 ("HO2S Circuit High Voltage Bank 2 Sensor 2").

Had the oxygen sensor (after market) replaced and code cleared by a Mechanic. Just after driving about 10 kilometers, the engine light came on again. It again shows the same code. The light sometimes goes off and again comes on; While it's off, the fuel consumption improves (7.5L/100 km on highway). I have driven more than 10'000 kms since replacing the sensor.

The left rear sensor as looking at the engine from the front was replaced. Is this the right sensor as per code P0158?

Answer 3

When you changed the Oxygen sensor's was the work done by a mechanic or did you do it your self? If you did it your self you need to take it to a garage that has the capability to connect your car to a computer and rest the cars computer. You can try and disconnect the battery for a few minutes then reconnect it and that may or may not reset the computer. It could also be a valve in the fuel injection system with a bad sensor too. Either way the vehicle needs to be check out again.

If you took the car to a dealer then take it back either they did something wrong or they need to reset the computer because they forgot to do that step. You can try to correct this problem by having some one rev the engine up to about 5k rpm's then pull the power brake hose off the power brake buster. This will blow out any built up carbon in the exhaust cleaning it out and should make the light go out also.

There are time that fixing something your self is a must for what ever the reason. However that said it is always better to take it to a garage if you are not a mechanic your self...

Hope this helps you with your problem...

Answer 4

If I remember right, that car has 4 o2 sensors. 2 up stream, and 2 down stream sensors. The code should say 1 to 1 sensor. Which will be the left sensor in front of the left cat. converter. Or 1 to 2, the left sensor behind the left cat. converter. Or 2 to 1, the right sensor in front of the right cat. converter. And finally, 2 to 2. Which is the sensor behind the right cat. converter. Some times when the program is put in the controller, It's not put in correctly. When I check out a sensor, I disconnect the suspected sensor and monitor the change with the scanner. You would be surprised how many times the code and real sensor don't correspond with one another. And this will have you going after the wrong sensor.

Answer 5

Don't do anything. There is no code to reset. It's out of sync with the engine computer, but links up on its own.

Drive it at least 300 miles and it will go out by then.

It takes driving time for newly installed oxygen sensors to relay properly with the computer.

Piece of mind? Call your nearest state vehicle emission testing facility and ask them the same question. I guarantee they'll give you my answer.

Answer 6

they have to reset the code in the engine computer and tell the computer that you put in a new sensor. I took the stupid computer for that out of my jeep and just threw it away and now I replace things when the book says too. My brother taught me this. Cause they charge like 60 dollars to read and reset the computer or replace it if it is like the one that was in my jeep. I also went under the front seat and got rid of that stupid buzzer. I put on the belt and shut the door OK without a buzzing nanny to tell me too do it.

Answer 7

there might be more than one o2 sensor..... have you checked? it might also be the wire not the sensor at all. check to make sure that the wire is not frayed or anything. or it might be something that is making the o2 sensor to come up with a reading....maybe a coil? what engine is in it?

Answer 8

Did you reset the code?

Other than that bad wiring?