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Repair the source, light will go out if that was the only problem. There are "monitors" or self tests the computer runs the car through a drive cycle, if a problem occurs, it may not run all of the self tests until that problem is taken care. Therefore, another problem may exist. It is emission related. OR hook up a scanner that is capable of clearing codes, and hope that none are still active. Disconnecting the battery can create other headaches and will not likely solve your dilemma. Best bet is to contact the local snap-on dealer and have him refer you to a known good shop that specializes in this technology-he will know. The " check engine light" is by far one of the most misunderstood technological advances by the public. This is an needed in-depth understanding for the public. It is a warning light that is illuminated when there is a problem affecting the EMISSION SYSTEM only. Emission system being the pollution control system. Don't get a hard on against it as it is a good thing once you understand it. One point that was brought up a a recent meeting of technicians was that the amount of hydrocarbons is greater when the gas cap is left off than when the engine is running. Hydrocarbons are part of pollution emitted as gasoline evaporates. Going a step farther, one facet of the emission system is the "Evaporative" portion. This is when the fumes from the gasoline are leaking from the system into the outside air. This is one part of the emission system that can trigger a check engine light. I would say that about 7% of the vehicles that have a check engine light are the result of a loose or inadequate gas cap. But understand that many scenarios are possible with the "check engine light" The vehicle's powertrain computer (note that some vehicles have 17 different computers) will run a series of self-tests. They will only run under certain criteria. And they can be vastly different from manufacturer to manufacturer. Some self-tests are not run until preceding ones have run successfully. So if there is a problem in one particular area that is preventing another self test from running, you can have a situation where one problem is fixed, but another still exists. If you fix a problem and drive the car through a drive cycle that sets the monitor (or self test) the light will go off as it passes that criteria that triggered it in the first place. After 1996, the auto industry went to a idea called OBD II (on board diagnostics). This was to get all the manufacturers onto a similar plane for troubleshooting and powertrain control. While they still differ vastly, many corrections and adaptations were made for technicians to better fix the check engine light problems. Prior to this there were so many different and poor troubleshooting data from a check engine light problem that resolving the problem was much more difficult. Many early warning light of this nature were set to illuminate based on mileage. An Oxygen sensor was one of the things that were meant to be replaced when that mileage was hit. This is much like many current "Change oil lights
What else can I help you with?
How do you reset check engine light on 2003 4.3 blazer?
The check engine light is illuminated for a reason. One of the engine control devices has probably ceased functioning. Take the vehicle to a shop for diagnosis, and repair of the problem.
How long after you reset the check engine light do the codes clear in your cars computer?
pretty much instantly. As soon as the codes are cleared the check engine light goes off and vice versa, unless there still is trouble. In this case the codes won't clear until the trouble is repaired.
How do you reset the check engine light on 1993 Subaru Justy?
After repairing the cause of the code, you can clear it with a scan tool.
What is the most common reason for the engine management light on a Mitsubishi space star to come on?
Probably an O2 sensor has worn out. You can take your vehicle to an AUTOZONE store and have the codes read for free. This will pinpoint the check engine light problem.
On a Honda prelude 1996 transmission have somthing to do with the check engine light to come on?
That is very possible but most likely yes
Will resetting the check engine light also resolve the existing problem temporarily?
No, resetting the light will not fix the cause of the problem.
Can a bad themostat make the check engine light come on an 2001 kia sportage?
Yes.
Will having my ecm help with reset?
Resetting the ECM without fixing the reason why the check engine light came on will only lead to the check engine light coming back on soon.
How do reset the check engine light after an oil change on a 07 Toyota Camry?
Check engine light or required maintenance light. Procedure for resetting required maintenance light just answered. Check engine light requires an OBD II to determine problem and turn the light off.
How many miles do you need to drive to pass emission test after resetting check engine light?
50 miles
How do you reset a 1999 Audi A4 check engine light?
It has to be done with a scan tool. Resetting the light without correcting the problem will be of no use as the light will come back on.
How do you turn off the check engine light on my 91 Mercedes 300 SE?
The best way to turn off the check engine light on a 91 Mercedes 300 SE is to disconnect the battery. However, resetting the light this way will not fix what made the light come on.
Resetting check engine light on 2005 silverado?
disconnect battery cables and touch them together! I have done this and it worked. I have an 05 2500hd
What does check engine light mean on 1999 4runner with 140000 miles on it?
check engine usually is emissions related, try resetting by disconnect negative battery terminal for about 5-10 minutes.
How do you reset the engine control computer on a 1999 Buick Lesabre?
If you are referring to resetting the Check Engine Light then you will need to have someone with a scanner to do it. If you are referring to reprogramming the Engine Control Module then the dealer will do it.
What can I do if my 1993 Ford Escort won't start and the check engine light and the fuel cut off switch light are both on?
Try resetting the fuel cut off switch and see if the engine will start
How many miles do you have to drive a 200 Jeep Cherokee to pass New York State inspection after resetting check engine light?
65
