How to create a check engine light?

I'm moving out of state in about a month but my tag expires March 31. My current state will only sell me a temp registration tag if I fail an emissions test, check engine light accomplishes this. What is the easiest way to cause the light to come on without doing any permanent or expensive damage?

 

Well that’s a new one... disconnect aft o2 sensor?

 

Drive around with your gas cap off

 

Disconnect maf

 

Un plug a spark plug

 

Put Diesel in it

 

Put a jeep sticker on your truck

 

Easiest no damage is take the gas cap off...lol

 

Try driving it with no wheels.

 

Gas cap for sure, had mine come on twice because of it now. It even stays on for about 100 miles after you fix it. But they will be able to read the code and see that it is for the gas cap.

 

Or register in your current state and then wait till your tags expire for your new state. I've done that one before. Depends which state is cheaper.

 

Let me guess, locking aftermarket gas cap and parked on a hill??

 

Nope, just my own loss of attention where I apparently didn't screw it down until it clicked haha. Even went to autozone to have them read the code for me. I left in shame.

 

Drill a small hole through a stant gas cap.

 

Instead of a P code it just read [DUMASS]

 

Or the block

 

Unplug a vacuum line or a coil while it’s running. Will instantly throw a code. Gas cap will take a while.

 

unplug any vacuum hose.... creates vac leak.. no real damage... just runs shitty...