Join Date: Sep 2009
Location: East Central Illinois
2008 Accent 3 door
2010 Genesis Coupe
2L Track 6 sp man
Mentioned: 13 Post(s)
Quoted: 883 Post(s)
If you monitor the O2 voltage for both sensors on the bank, what you want to see is after driving at a constant speed for a few miles the second O2 will run just below the average high voltage of the first O2. So if you see the first O2 peak around .750v say, then the second O2 when in closed loop and constant throttle should be around .700vs, but not oscillate like the first.
If the two O2s are mimicking each other then the cat is not doing anything.
"Imagine a world in which we are all enlightened by objective truths rather than offended by them." Neil deGrasse Tyson