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The check engine light (service engine soon) comes on and stays on when a problem is detected by the self diagnosis system of your vehicle. Generally, the problem is in the emissions or something that is affecting the effectiveness of the emissions, but other causes can trigger the light to come on, too. To determine the cause, the vehicle will need to be taken to AutoZone or a shop that has an OBD2 scanner, or for 1995 and earlier models, an OBD1 scanner, While a scanner will not give you the magic answer, it will give you a code that narrows down the problem area.
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Why check engine light on for weeks then goes off for weeks?
The failure is intermittent.
97 cougar intermittent won't run no codes or check engine light?
Could be a weak ignition coil Check for fuel and spark
Does the 1996 Nissan maxima have an intermittent problem with the check engine light coming on and off?
If the light comes on there is a code. Have the code checked and fix the cause. If the light is on with no codes, then you have a computer problem.
Why do your internal lights and radio surge on and off with the check engine light on in your 88 s15 jimmy?
Sounds like some kind of intermittent electrical short
On a 1995 subaru impreza 1.8L could an inoperable EGR valve be the cause for an intermittent check engine light?
Yes, along with dozens of other things.
What is the dashboard light on mondeo zetec that resebles an engine?
That is the check engine light.That is the check engine light.
What does the check gauge light mean on a 96 Chevy c1500?
It means the vehicle will not pass an emission test.
Is the check engine oil light the same as the check engine light?
No, oil level does not cause the check engine light.
Not check engine service engine light?
The service engine light is the same thing as a check engine light.
2001 Honda Passport and sometimes the check engine light flashes but other times it does not?
A flashing check engine light indicates a "catalyst damaging" misfire. Do not drive while light is flashing. It can(or already has) cause damage to your catalytic converter which can be very expensive to replace. It is likely you have an ignition problem on one cylinder. Bad coil or wire or something like that. It is not uncommon for that to be an intermittent problem. Your check engine light only flashes when it detects the misfire is present at that time. The regular check engine light will remain on to remind you there is a problem that needs addressed.
1998 ford explorer check engine light?
The check engine light is the light shaped like an engine, or the light that states Check Engine (Soon). If this light comes on, it is time to see what the issue is with the engine.
Why does your check engine light come on in 1999 GMC suburban when all the gauges are fine and nothing needs to filled?
Check your gas cap. if it is not sealing properly, it will trigger a soft code. (meaning intermittent). It is an emissions code.
