Check Engine Light Will Not Come On

Recently it failed a smog check due to the fact that the check engine light would not come on.

Check engine light will not come on.

If your check engine light turns on immediately after a fill up pull over and make sure the cap isn t loose or still on your car s roof. Let s take a look at the most common issues. This is called the self test mode for the computer. The engine computer stores a diagnostic code when the light begins glowing.

Since you said the other lights work then. But the engine never goes on due to the check engine not being part of that sequence it comes on at the end of the cycle and the truck will not crank over. Recently it failed a smog check due to the fact that the check engine light would not come on. I doubt any of the things mentioned have any affect on the check engine light.

When it runs into an issue that the ecu cannot correct the check engine light cel starts glowing. A loose or missing gas cap will trigger your honda check engine light to come on. In the beginning it would do it on and off but i kept an eye on it and everytime the check engine light. When turning the ignition switch to the run position the check engine light should come on.

If the check engine light doesn t come on in the run position it means the computer failed the self test mode and there s a problem with the computer. 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. When you turn ignition to on position the engine computer is supposed to run some checks and turn on all the warning lights on such as check engine battery and etc. In general five common malfunctions can cause the check engine light to come on and some of them are simple to fix yourself.

It could be a temporary. And then they are supposed to turn off once the engine is running. If that s all that there is your honda check engine light will reset on its own within a couple of days. Oxygen sensor needs to be.

The same power feed in the cluster powers up the seatbelt light abs and a couple others. The light bulb for cel has a power feed with 12 volts runing to it with key on all the times. Occasionally the check engine light comes on when nothing is wrong with the car said steve mazor chief automotive engineer for the auto club of southern california.