Question about Mitsubishi Diamante

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I am a female trying to save some money, I would like to know if the 02 sensor something that I can replace

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There are several variables here. First, is your mechanical ability. O2 Sensors are not really mechanically challenging, but on a lot of Mitsubishi vehicles, there can be a lot of disassembly involved in getting to the wire clips, connectors, and even the sensor itself. Some of them are very easy to get to. Your vehicle (We don't know exactly what kind, because you didn't tell us year, model and engine size.) most likely has several O2 Sensors. Some of these sensors can be accessed by simply opening the hood. Others may require dropping the engine sub-frame down to provide clearance to get to it. So it goes almost without saying that you need to know which one you are replacing, and exactly what is it going to take to get to it.
Then ther is the "Oxygen Sensor REALLY STUCK syndrome". This is what I call it when I pull on my oxygen sensor wrench with both hands and the oxygen sensor will not budge. That's when you have to get out the "Heat Wrench". (Also known as oxy-acetylene torch) This is where you heat the exhaust pipe around the oxygen sensor until it glows red hot, then pull with both hands on the wrench to break the thing loose and hope with everything you have that the threads stay in the exhaust pipe so you don't have to rethread it for the new oxygen sensor.
Then there is the whole oxygen sensor code thing. Are you absolutely certain that the vehicle NEEDS an oxygen sensor? If your computer is giving you an oxygen sensor code, is does not necessarily need an oxygen sensor. Many oxygen sensor codes cannot be fixed by replacing the oxygen sensor. This is because the oxygen sensor is working properly and is only REPORTING a problem with your engine management system, which needs to be diagnosed. In these cases the oxygen sensor is only the "informer". Replacing the oxygen sensor will only cost you more money. The new oxygen sensor will then become the informer and tell you that the engine management system STILL needs to be diagnosed and repaired. In this case the DIY thing will eat you money up, not save it.

To wrap this all up in real simple terms...

There are some that can be a real nightmare. There are others that any 7-year-old child can replace.
In either case, you need to know with a certain amount of assurance that this will fix the problem.


Please also review this article: What Else Could Be Wrong?

Posted on Apr 09, 2011

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  • Mitsubishi Master
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Depends on how strong you are because these sensors are in the exhuast manifold and they are uasally rusted.You have to be careful not to cross thread them when you reinstall.

Posted on Apr 09, 2011

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No I can not give you the code number because I did not scan it for you. The Diagnostic Trouble Code will show ( example 02 Sensor Bank 1 sensor 2 ) for the sensor at fault, or something simaller for one of the other 02 sensors. Fore ( example 02 Sensor Bank 2 Sensor 2 ).The parts store that did the scan for you should have given you the particular fault code as well as its location. If you replace one 02 sensor, you should replace all of them. Good Luck and have a good XMASS.

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I own a 1997 Pontiac Bonneville my check engine light is on when I got the codes read it said that I had an bad O2 sensor and my mass air flow sensor is bad. My car cuts off on my while I am driving could...


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