My check engine light was on and was an o2 sensor before the catalyst code. I changed the o2 sensor and it came back on after about 3 drives. I replaced the o2 sensor again thinking it may have been a bad one and again the check engine light come back on indicating the same problem. What else could this be?
2006-12-05 14:27:15 · 8 answers · asked by Matt F 2 in Cars & Transportation ➔ Maintenance & Repairs
are you sure you got the right one, my Explorer has 4 of them :(
2006-12-05 14:31:39 · answer #1 · answered by Anonymous · 0⤊ 0⤋
there are actually a few differnt things that can cause a o2 code. It could be as simple as an air filter, also check the wiring harness to the o2 sensor. could be corroded and or broken. May also be another o2 sensor... some vehicles have 2 or 4... left and right bank before and after, make sure you changed the right one. You could also have a bad cat. converter. Also if you don't have the equipment to reset the codes drive cycles will restet codes if the proper repairs were made. With new inspection procedures her in NY and in many other states it is not recomended to reset codes as drive cycles can be more than 100 miles in some cases...
2006-12-05 14:45:45 · answer #2 · answered by Rich K 2 · 0⤊ 0⤋
On this stuff you can not just replace parts. You need to make sure the other sensors and controls are working right. Without knowing the type of car you drive hard to help you.Is the wiring from the sensor to the computer good . It could be the injector dripping and the computer can not lean out the mixture enough. This cause a false O2 sensor code. Could be lots of other stuff to. Fuel pressure to high or low , map or maf sensor out of cal. Tough to give you an answer with so little info
2006-12-05 14:35:17 · answer #3 · answered by Rudedude 4 · 0⤊ 0⤋
Agree with Vonnie C. It's situations like this that expose why you get what you pay for with a "free" code reading at the parts store. More often than not an O2 sensor code does not mean the sensor has to be replaced. There is a long list of tests that have to be run to determine what caused the code to be triggered. Depending on the make/model/year of vehicle there coudl be dozens of different tests and checks required to determine the cause. Your issue requires a real mechanic with real diagnostic tools and expertise. That's why they make the big bucks.
2006-12-06 00:59:33 · answer #4 · answered by Naughtums 7 · 0⤊ 0⤋
Sounds like you something else may be triggering the light. Vaccuum leaks cause a lean O2 code. So do bad fuel pumps and dirty MAF sensors. Whereas a bad fuel pressure regulator can cause a rich O2 code, but worn spark plugs or a missfire due to bad wires can as well. Parts stores read trouble codes for free because they want to sell you parts, but you need some good ole fashion diagnosis on this one.
2006-12-05 15:26:25 · answer #5 · answered by Anonymous · 0⤊ 0⤋
Is it on a chevy truck? One thing you want to watch out for, is if you have an exhaust leak, ahead of the o2 sensor. That will cause the light to come on again. depending on what kind of vehicle it is. could be the coolant temperature sensor.
2006-12-05 14:37:41 · answer #6 · answered by Speedbuggy43 4 · 0⤊ 0⤋
i own a repair shop,,and after you replace the sensor you have to erase the trouble code from it,,or it will come back every time,,and if it has more than one sensor it may need more than one replaced on it,most cars now have to,,an updraft,and a down draft on them,,good luck,but remember ,it has to be erased from it,,good luck with it i hope this help,s.
2006-12-05 14:31:18 · answer #7 · answered by dodge man 7 · 1⤊ 1⤋
i think some cars have more than 1 oxygen sensor. maybe there is another one that is bad?
2006-12-05 14:34:14 · answer #8 · answered by Meg 7 · 0⤊ 0⤋