With a scan tool.
You can disconnect the battery for a few minutes and that will clear the light. If there is a problem with the engine the check engine light will come back on. If it comes back on you will have to have the computer code read and fix the problem.
I find in most cars with computers that if you disconnect the negative lead to the battery for about 20 to 30 seconds that the check engine light goes out. If it re-appears the you need to have it a code reader hooked up to the computer to find out what's wrong
Yes the light bulb is replaceable.
Do you mean the check engine light does not come on when you turn the ignition on? Possibly the bulb is burnt out.
Be more specific! Warning light or check engine. If, warning light. What function?
when a check engine light is flashing on any car means that there is a very strong miss fire that could damage the cat.
Problem with emission systemhave vehicle scanned to determine the problem
the check engine light goes on and off
You can reset the brake warning lights, on your VW Jetta, by backing up 20 feet and using the brakes. The automobile will sense the new pads and the warning light will go off.
the light can only be cleared by a scanner take it to a qualified mechanic
The chech engine light is located in gauge cluster, bottom center. You sould see it flashing a amber light when you turn the key on but not in the start position. If not on the balb might be bad.