Process of elimination.
#1
Process of elimination.
Got a new cel over the weekend P0139. Rear o2 sensor slow circut response. The possible causes are numerous according to Mazda's manual that I'm looking at online. Going down the list. Purge solenoid valve malfunction, loose o2 sensor (checked already). exhaust leak (can't hear any), bad o2 sensor, fuel line pressure malfunction, fuel leakage, fuel pump failure, AIR system malfunction, leaking coolant (can't see, smell any, coolant not low) PCM malfunction. Some I can eliminate some not so sure. Any speculations.
A little history on my car, 2004 manual, 43,000 mi. started premixing 3,000 miles ago. only 4 oz for a full tank. have racing beat intake, rp highflow cat, greddy exhaust. Can't think of anything else that would be relevent. Thanks all.
A little history on my car, 2004 manual, 43,000 mi. started premixing 3,000 miles ago. only 4 oz for a full tank. have racing beat intake, rp highflow cat, greddy exhaust. Can't think of anything else that would be relevent. Thanks all.
#5
The CAT is about 8-9000 miles old.
That's what I'm thinking, but the only reason I'm not 100% is there are not drivabilty issues, so could the CAT be falling apart rather than clogging? Or is it just the quality of the CAT, not very good so doesn't work the way it was intended.?
That's what I'm thinking, but the only reason I'm not 100% is there are not drivabilty issues, so could the CAT be falling apart rather than clogging? Or is it just the quality of the CAT, not very good so doesn't work the way it was intended.?
Last edited by bose; 07-21-2008 at 02:09 PM.
Thread
Thread Starter
Forum
Replies
Last Post
Shankapotamus3
Series I Trouble Shooting
28
03-14-2021 03:53 PM