Three codes
Thread Starter
Junior Member
Joined: 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
Senior Member
Joined: May 2008
Posts: 1,767
From: Moore, OK
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
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Kyle Lee Cleveland
6th Generation Maxima (2004-2008)
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Sep 28, 2015 09:01 PM