SwiftStreetLude

Ok heres my story:

Back in OCT 06, my engine light came on and showed Engine Error Code PO401-EGR Insufficient Flow Detected
. After months of trying to figure out how to fix the problem ( as showed in this thread -> https://www.honda-acura.net/forums/s...d.php?t=252827), I finally got my EGR Valve Ports cleaned in FEB 07 and that solved the problem.

Now, its March 08 and just recently my engine light came back on. I didnt pull the codes at first, because I figured it might be the EGR Valve again and just swapped out my old EGR Valve with a used one I bought from a 97 prelude. It seemed to work fine for a week with no engine light, but just yesterday it came back on. So I took it to my local Sears to have the engine codes pulled and they showed P0420-Catalyst System Efficiency Below Threshold.

Engine Error Codes List - http://www.troublecodes.net/honda/hondaobd2.shtml

Now a few questions:
1. Will the EGR Valve affect this code? Because it seemed to work fine for a week when i did change it out.
2. If not, then what else do I need to do in order to get this problem resolved?


Thanks for any help.

Luder916

Have you checked the O2 or Cat. Coverter.

Sayashi

i would suggest test primary o2 sensor first then test secondary o2 and compare the result if its major different then something is wrong with cat

SwiftStreetLude

Well heres an update. I took my car to my local honda automotive specialist shop and they tested to see if it was the cat or 02 sensors. They told me it was the cat converter and i needed to get a new one. The quoted me $630 bucks! $536 for the part and $78 for the labor. I told him I would look for a cat myself. This was on Tuesday. Then yesterday, I was driving to work and suddenly the engine light just cut off. So my question is:

1. If the engine light cut off by itself without me doing anything, wouldnt that mean its an o2 sensor thats bad instead of the actual converter?