My Check Engine Light Will Not Come On

And it could be serious.

My check engine light will not come on.

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. If it does then the system is working. I have a 1998 chevrolet s10 my check engine light will not come on i replace the bulb still nothing anybody got any ideas please let me know could it be a wire they cut at the computer. Recently it failed a smog check due to the fact that the check engine light would not come on.

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. 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. 05 01 2018 by marvin hobbs. It might be a minor problem.

Pull over tighten it and take a look at the cap to see if it. It is not an indicator of trouble like the check engine light is. 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.

But do you really want to take that gamble. My miata was running fine parked it for the night the next day it will not start. Add a comment. If you learn your vehicle s ins and outs you won t need a check engine light to tell you when something is wrong.

If your check engine light comes on it s best to take your vehicle to a mechanic to get it professionally diagnosed and repaired. Your local mechanic can usually diagnose the problem for about 75. But there s a way to preview what the problem might be. 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.

If the dashboard light is good then the ecm could be defective causing the light to not come on. And you may even avoid the issues that cause the light to come on in the. Try removing a sensor harness and see if the light comes on. X research source warning.

It has an old battery but it still turns the motor over good just checked batt. If that light has come on that means there s a problem. This light is the centerpiece of your vehicle s on board diagnostics system obd.