p0420 p0430 p0171 p0174
#1
Instructor
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p0420 p0430 p0171 p0174
As of yesterday all 4 of these codes popped up. My gas mileage is poor and when I reset the light, it comes back in 30ish miles. I placed my assumed fixes based on my findings from the search below, but is there a chance that something else could warrant all these codes? 180k
P0171 & P0174
I must replace the e.g.r valve and all 6 injectors. I may also need the PCM update from the dealer.
P0430 & P0420
The worst case scenario would be two catalytic converters and all 4 o2 sensors.
I did find a post in which an owner stated the first two codes came from a clogged breather hose that came from the transfer case. Is anyone familiar with that?
P0171 & P0174
I must replace the e.g.r valve and all 6 injectors. I may also need the PCM update from the dealer.
P0430 & P0420
The worst case scenario would be two catalytic converters and all 4 o2 sensors.
I did find a post in which an owner stated the first two codes came from a clogged breather hose that came from the transfer case. Is anyone familiar with that?
#2
Have you checked your battery?
#5
Instructor
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#6
Senior Moderator
Pull off your EGR valve and give it a good cleaning with carb cleaner along with the EGR pipe that goes to the intake manifold.
From what we have seen here, P04#0 codes mean new cats are on the way.
From what we have seen here, P04#0 codes mean new cats are on the way.
#7
Instructor
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I found someone selling cats from an 08 TL. I recall reading that they fit so I'll have to pick up those.
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#8
Senior Moderator
I don't think those fit if they are from the J32. You need the 3.5L cats from the Accord or TL-S.
#10
Instructor
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Depending on the price, I just might. But then I'll need to fab up defowler
#11
Senior Moderator
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Chans (03-10-2014)
#13
Instructor
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That's where i intended to start. Hopefully a new filter and EGR valve will allow me to hold off on getting the injectors.
#14
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A new egr got rid of the p0171 & p0174 codes. The other codes remain so my dreams were killed. My quest for cats continue as the local ones have been sold.
#15
did you replace or lean or both?
#17
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#18
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