I tried disconnecting the battery on my Mazda 2002 millenia. Yeah it worked, for only a short while. When the odometer registered 500 (additional miles) the check engine light re-sets and comes back on).
The check engine light comes on at start up for a bulb check. If it stays on with the engine running the computer has detected a malfunction. You need to have it checked for codes.
It is not supposed to be on when engine is running unless there is a problem.
If your check engine light is blinking with the engine running that is indicating a misfire - get your vehicle scanned for any trouble codes to diagnose and then repair the problem
"Check Engine" light comes on when you turn ignition switch on and should go off when engine cranks.
why do check engine light comes on
The code with a scan tool.
The "CHECK SUSP" light comes on in the run position just before starting the engine to check the bulb . If the warning light comes on with the engine running that indicates that the air suspension system requires servicing
When the check engine light comes on it should post a code. Use a code reader to see what the code is and ask again.
You check engine light is signaling to you that there is something wrong with you car. You should have your car looked at by a professional.
engine lightyou should go and get it checked out somewere because that isn't good.
Check for a loose or coroded battery cable Check for a loose ground wire Check the output of the alternator with a voltmeter A fully charged battery should read around 12.8 without engine running With engine running reading should be 13.8-14.2
I washed my car at the car wash, then I washed the engine with engine/tire cleaner with the engine running, since then my check engine light has been on. Sometimes it blinks fast, goes off and then comes back on steadily. The engine sounds like sputter, misfire, rough sound from the tailpipe. The entire engine seems to be running fine, no shaking or bouncing, just running normal. What is the problem? Thanks for your help.