Check engine light is on sats it has to do with o2 sensor, replaced it with a universal one. Problem went away for two weeks and came back saying same thing what should i try now.

These may be few possible reasons why the check engine light won't go away after replacing the O2 sensor in your 2000 Mitsubishi Eclipse V6

·The wrong O2 sensor was replaced or the O2 sensor is properly connected to the wiring harness(any signs of damage or corrosion).
·Sometimes, issues with the engine, such as misfires, vacuum leaks, or problems with the fuel system, can trigger the O2 sensor to report a problem. Ensure your engine is running smoothly and there are no other issues that could affect air/fuel ratios.
·The new O2 sensor is defective. If the O2 sensor is working properly, then the check engine light could be due to another problem with the exhaust system, such as a leak or a problem with the catalytic converter.
·Problem with the wiring to the O2 sensor. If the wiring to the O2 sensor is damaged or corroded, it can cause the sensor to malfunction and trigger the check engine light. To diagnose the exact cause of the problem, you will need to have the car scanned by a qualified mechanic. The mechanic will be able to read the trouble codes from the computer and use that information to pinpoint the problem.

I'm willing to bet you have weak upper O2 sensors & there's nothing wrong with your knock sensor. But if you want, the knock sensor is under the lower intake manifold in the back that is located under the upper intake manifold also called the upper plenum. The lower intake manifold is wedged between the 2 heads and is an enormous pain in the azz to get to. You can check the O2 sensors with a scanning tool that will show you the upper sensors in bank 1 & 2 bouncing electrical current from about .5v to 5v several times per second. Anything less show weak sluggish sensors. The resulting lean mixture causes a knock. Change the sensors and the knock goes away and so does the engine light after you reset it. It took me 6 months to find this problem after replacing everything else including the 6mth old O2 sensors fresh from China. Now I have Bosch. PS The lower sensors went 2 weeks later & I was told any more problems it's the fuel regulator. 2001 Frontier 3.3l v6. No problems since, it purrs like a kitten. I'd suggest the Bosch, it's a special design for that 3.3l engine.

i have replaced an O2 sensor and had similar failure after 1500 miles.
I removed it, chkd it, reinstalled it and it ran fine.
P0133 is related to slow response of O2 sensor. P1134 is mfg specific so google that for ur car.

One suggestion I have is that each of the new type of engine's have an O2 sensor which is part of the exhaust. This is used by the computer to measure the amount of O2 in the exhaust gasses in the exhaust.
Try using this url link

Dodge durango o2 sensor bank 1 location

if it does not connect select the whole link start a new tab and paste the link to the URL address bar.

2004 durango exhaust oxygen sensor Google Search

some images of the exhaust system.

Mopar Parts Worldwide Mopar Parts for Dodge Chrysler Jeep

some other information and suppliers.

Make no repairs until a proper diagnostic is run on the cause of the check engine light by a factory trained technician.

ok first of all did you replace the bulbs for the reverse lights ?
the sensors that you replaced are they the o2 sensors or ??
and if you havent replaced the o2 sensors i would start with the one behind you catalytic converter because its most likely going to be that o2 senso or its going to mean you have a bad catalytic converter and its not doing its job right anymore.

If he used a "universal" O2 sensor, you could have a wiring problem. I had the exact same behavior on a Mazda MPV. The universal O2 sensors have to be crimped to the old sensor connector, which can cause problems. You can check the wiring closely, or insist that he use an OEM sensor, which will have the proper connector attached.

if the code is for the rear cat o2 sensor i suggested to replace the cat. the rear o2 sensor is to tell the commputer ha good is the cats if the cat not burning the gas. the commputer need to see the o2 sensor to check the cat's

You need a code scanner hooked up to find out what is causing the light ot come on. Some auto part stores can do that. Once the code is retrieved, they can tell you what sensor is causing it.

Replace O2 sensor. They have to be really hot in order to read right. Did you ensure to drive around a good 30 min to make it hot?