Why no CEL?

[NiceCobra]

I installed my o/r prochamber a few months ago and still don't have a CEL on the dash. I thought going catless would cause a cel? Granted I haven't driven it a ridiculous Amt since it's winter here in nj but I still think I've driven it enough.
Anyone else ever experience this?

 

[hotcobra03]

I have long tubes no cats and no cel...with all o2s on

 

[Crimson2v]

The vehicle may not have completed all readiness monitors since the install.

 

[Bobonater]

Sometimes the pcm can be forgiving. I had a escort I cut the cat off of when it got stopped up and drove it for another 100k and never got a cel some cars just don't care if they have cats or not.

 

[landonvan]

If has been tuned. They may have shut them off.

 

[NiceCobra]

Nope not tune here. I've driven at least 1500 miles since I installed the prochamber. But I'll be getting a tune in a month or so. I was just curious

 

[cj428mach]

My car made it over a 1000 miles before throwing a CEL after swapping on the Off road pipe. I thought I had it turned off in my tune but didn't, it scared me when a CEL came on out of the blue. I was glad to see it was just a no cat code.

 

[NiceCobra]

Update
Cel finally popped up today, ran and got it scanned to confirm it was just the cats