My engine light came on for 10-20 seconds 3 times, usually when I just worm up the car and start to drive and only once untill the next time I strat to drive after a while.4 possiblities, can it have to do with a blow off valve I put on, can it be that I got rear ended not to hard but dented trunk and hole in bumper, and it started to happen that day, I had very low oil, or just some other problem?

Any advise would be great thank you

 

you can check for codes with a voltmeter. search the forum it's been posted how to check before

 

If your car is a 95 or older, you should be able to check the codes via this procedure.
http://www.stealth316.com/2-diagcodes91-93.htm

 

thx ill check it out

 

ty for all the info I have learned a lot from everyone here

 

You're welcome.