Three codes
08-02-2010, 11:00 AM
#1
Junior Member
Thread Starter
Join Date: Jul 2003
Posts: 26
Three codes
Hi all,
My CEL light has been appearing and vanishing for the last year in my 2000 GLE. I went in to get it inspected and it failed, of course. The engine codes are P0430, P0139, and P0138. The car runs great. I notice nothing wrong with acceleration, etc....any ideas?
Thanks!
Daniel
My CEL light has been appearing and vanishing for the last year in my 2000 GLE. I went in to get it inspected and it failed, of course. The engine codes are P0430, P0139, and P0138. The car runs great. I notice nothing wrong with acceleration, etc....any ideas?
Thanks!
Daniel
08-02-2010, 12:32 PM
#2
Senior Member
Join Date: May 2008
Location: Moore, OK
Posts: 1,767
Sounds like a clogged cat, and they are not cheap. Your best bet would be a junk yard or some aftermarket type.
On Board Diagnosis Logic
NFEC0214
The ECM monitors the switching frequency ratio of heated oxygen
sensors 1 (front) and 2 (rear).
A three way catalyst (Manifold) with high oxygen storage capacity
will indicate a low switching frequency of heated oxygen sensor 2
(rear). As oxygen storage capacity decreases, the heated oxygen
sensor 2 (rear) switching frequency will increase.
When the frequency ratio of heated oxygen sensor 1 (front) and 2
(rear) approaches a specified limit value, the three way catalyst
(Manifold) malfunction is diagnosed.
Malfunction is detected when three way catalyst (Manifold) does
not operate properly, three way catalyst does not have enough
oxygen storage capacity.
NFEC0214
The ECM monitors the switching frequency ratio of heated oxygen
sensors 1 (front) and 2 (rear).
A three way catalyst (Manifold) with high oxygen storage capacity
will indicate a low switching frequency of heated oxygen sensor 2
(rear). As oxygen storage capacity decreases, the heated oxygen
sensor 2 (rear) switching frequency will increase.
When the frequency ratio of heated oxygen sensor 1 (front) and 2
(rear) approaches a specified limit value, the three way catalyst
(Manifold) malfunction is diagnosed.
Malfunction is detected when three way catalyst (Manifold) does
not operate properly, three way catalyst does not have enough
oxygen storage capacity.
Possible Cause
NFEC0504
I Three way catalyst (Manifold)
I Exhaust tube
I Intake air leaks
I Injectors
I Injector leaks
I Spark plug
I Improper ignition timing
NFEC0504
I Three way catalyst (Manifold)
I Exhaust tube
I Intake air leaks
I Injectors
I Injector leaks
I Spark plug
I Improper ignition timing
Thread
Thread Starter
Forum
Replies
Last Post
Kyle Lee Cleveland
6th Generation Maxima (2004-2008)
1
09-28-2015 09:01 PM