Sunday I tired to start my car and all the gauges went up and but the engine wouldnt start.After several attempts I left it alone.I thought it was the crank sensor and replaced it,still didnt work.So my mechanic used the OBDI 2 and got a P101 error if im not mistaken.Which ment i needs a Mass Air flow sensor.Replaced it and it worked like new.My issue is why didnt i get a check engine light on the dash?And is their any way 2 fix it? Every 1s oppion and thoughts are welcome Thanx....

 

Perhaps the light blew out on the dash? Turn your car to the ON position, not starting it, the CEL should be lit.

 

No that light comes on when the car is on.Thats the first thing i checked.

 

There are conditions for how many consecutive times a code must be thrown before it pops the Check Engine Light.

Basically, you car does NUMEROUS diagnostics while you are using it. If one of those fails, it logs a code. I think many of them have to fail three times consecutivly before it lights your Check Engine Light.

I've been doing a lot of work with a Snap-On ODBII scan tool. It can find out information such as:
Codes thrown this ignition cycle
Codes thrown since last cleared
Current Codes

Current codes are the ones currently causing the Check Engine light to pop up. I'm sure that Snap-On scan tool can get more then that, but that's a pretty cool amount of info to access!!

 

Whoa.I never knew that.Thanx for the info