Mazda World Forum banner

1 - 2 of 2 Posts

·
Registered
Joined
·
7 Posts
Discussion Starter #1
Trying to diagnose a lean trouble code (P1170), so out of curiosity I've temporally removed the newish cat, and replaced it with the old hollowed out one.

I was more than surprised to see the computer entering and staying in CLOSED LOOP mode, as if the cat was still there and working normally....

Is Open/Closed loop status more of a temperature thing???
Any ideas?
 

·
Registered
Joined
·
7 Posts
Discussion Starter #2
Ok, just a quick update....

With no cat installed, I can't get the computer to log check-engine-codes anymore, regardless of the driving style.
It's bizarre; with everything installed the way it should be, it logs P1170, and then with one of the critical components bypassed, it runs fine...? Am I missing something obvious??

I'll put the converter back in at the weekend, and see if code returns.
(Do I have this question posted to the right forum? - it's not getting many views here.)
 
1 - 2 of 2 Posts
Top