Check engine light will not go off changed both 02 sensors still stays on?
The sole function of the 'check engine' light is not totally restricted to malfunctioning oxygen sensors. There are a myriad of things that can cause this warning indicator to illuminate on the dashboard. When it come on, there is a code number then stored in the computer's memory - requires a special tool to read that code number and then interpret that number into plain language we can understand. The tool is quite expensive ... not what the ordinary DIY home garage wanna be mechanic would buy to use maybe once or twice a year. Places like Autozone will read the codes for a nominal fee. At least, that done, you will know what the problem really is. Shooting from the hip in troubleshooting car problems is not the best solution. Chances are, those oxygen sensors were okay and didn't even need to be replaced. Get it checked out to find out the real problems.
You have a volkwagon jetta vr6 2000 2.8 manual trans my check engine light came on you had the cat changed and both o2 sensors 250 miles later my light came on again 0420 CODE?
Maybe the sensors you changed out were not the problem. Post what the symptoms were, what the codes were, and why you changed out what sensors you did. Sometimes errantly the wrong part is diagnosed as being defective, like having low fuel pressure and people spend $500 for fuel injectors when in reality it was a clogged fuel filter for $10 Some cars take a few starting cycles or cycles of driving before they reset…
I have a 1995 Ford Taurus that runs fine but every time you hit a big bump the check engine light comes on for a few minutes then goes out what is happening?
yes if your car or truck has a schuled matience program in its onboard computer,or from belt not being tight enough.tighten your belt.then disconnect the battery neg. then cut the lights on in the car to drain the rest of the juice left in the car.that will reset the check engine light in most cars,if light comes on agin get codes from engine and check and clean sensors
You have replaced the O2 sensors in your 1998 Mercury Mystique how do you reset the check engine light w no diagnostic scanner?
Why is my engine light on my BMW 3 series on all the time as it has just had a service and work done on the brakes?
Just because you had it serviced and had brake work will not necessarilly stop the engine check light from coming on. It could have a new or re-occuring problem so that is why the engine light is probably on. The engine has several sensors that it gets information from and if any one of them sensors has a problem it can turn the engine check light on. Go and have it scanned to find out…
Why does a check engine light go on in a 1992 Toyota 4Runner with no loss of power and everything under the hood seems to be in proper order?
On a 2004 Grand Prix would a check engine light come on if coolant needs to be changedsince it has not been changed in 127k miles?
Your check engine light will not come on because your coolant needs to be changed. The only way to be totally sure why it is on you should get it checked with a computer at a dealer or service station. The check engine light may come on if it is over heating because there is no coolant in it but not if it just has to be changed.
Why does the check engine light come back on after you changed the o2 sensor before the catalytic converter?
Why does the check engine light still come on even after you changed the O2 sensor and reset the check engine light on a 1996 Lexus ES300?
Check engine light will come on for various reasons. The o2 sensors could be one of them. If your belt breaks the light will come on and the engine will over heat. I mentioned the o2 sensor because when it comes on for this reason some people have had that light on for years without replacing the sensor.
Your car has a number of places where leads attach to sensors. Those sensors go to a computer. When one of those sensors goes bad or gives a bad reading, the check engine light appears. It means something is wrong somewhere with your car. They can attach a computer to your car's computer and find out where.
Why is a 2002 Mazda mpv check engine lite coming on when all 4 sensors have been replaced car and the car seems to be running fine?
the check engine light could stay on because of other sensors. for example,the power steering sensor could be bad...this will cause the engine light to come on and other sensors could cause the engine light to come on. just get rid of the van. most sensors when they go bad cost anywhere from $200-$600 just because of the location of the sensor. manufacture put sensors in hard to reach places to keep you from replacing…