My Check Engine Light Will Not Come On

If you learn your vehicle s ins and outs you won t need a check engine light to tell you when something is wrong.

My check engine light will not come on.

My miata was running fine parked it for the night the next day it will not start. X research source warning. 05 01 2018 by marvin hobbs. Recently it failed a smog check due to the fact that the check engine light would not come on.

It might be a minor problem. Once the obd system resets which occurs after a few drive cycles or a certain number of miles depending on the vehicle the light will come back on if the problem has not been fixed. Turn the key on all the check lights come on except the check engine light theirs no spark no fuel pump. Recently it failed a smog check due to the fact that the check engine light would not come on.

If the dashboard light is good then the ecm could be defective causing the light to not come on. But do you really want to take that gamble. If your check engine light comes on it s best to take your vehicle to a mechanic to get it professionally diagnosed and repaired. But there s a way to preview what the problem might be.

Your local mechanic can usually diagnose the problem for about 75. This car runs great and in fact the emissions part of the smog test was we have a 1996 ford f 250 xl dual gas tanks. It is not an indicator of trouble like the check engine light is. Try removing a sensor harness and see if the light comes on.

Add a comment. If your dashboard before displayed the check engine light before and now it is not coming on then the dashboard warning light could have burned out. Since the 1980s many vehicles have been built to be run by the engine computer unit ecu which controls vehicle s drivetrain and auxiliary systems based on input from the vehicle s sensors this computer will make adjustments to your vehicle s performance to keep your ride running smoothly. After all if it s something more serious you could be left stranded.

And it could be serious. If your car isn t feeling jerky or strange when the check engine light comes on the first thing you should check is the gas cap. This light is the centerpiece of your vehicle s on board diagnostics system obd. If that light has come on that means there s a problem.

If it does then the system is working. And you may even avoid the issues that cause the light to come on in the. Pull over tighten it and take a look at the cap to see if it.