what would cause a 2006 subaru impreza with only 32,000 miles on it to need a new catalytic converter?

Asked by Dec 18, 2014 at 06:10 PM about the 2006 Subaru Impreza

Question type: Maintenance & Repair

Purchased from first owner recently.  The service engine soon light came on after having it
for just a few days.  I took it to the dealer and the code that came up they say indicates
that the catalytic converter needs replacing.  Everyone is surprised at this because there
is only 32,000 miles on this car.

5 Answers

11,385

Did you find out what code they pulled? There is no true code to my knowledge that indicates a bad catalytic converter. Is the vehicle running Okay? Any loss of power on acceleration or up hills?

5,285

There's a chance that the first owner ran the car when it was running bad, like fouling plugs, whatever to cause carbon to plug up the little honeycombs inside the converter. I doubt anyone would pull the converter and check inside to see if it could get away with just a cleaning.

94,785

I would be suspicious of that. I would run some seafoam through the engines intake then add a can to the fuel tank, find a clear stretch of road and wind it up, what we call "Blowing out the carbon" if you see stuff blowing out the tailpipe keep doing this until it quits. You can find more information on blowing out the carbon on you tube. Watch the tach closely, you don't want to over rev and blow the engine. If you have never done this maybe some of your friends have done it and can show you the in's and out's on doing this. After it is all cleaned out have the codes cleared and drive as you normally would to see if the check engine light stays off. If it comes back on with the same code then it could be a bad catalyst.

The code they pulled is P0420 and I recently had the fuel induction service done to it, which I was hoping would do the trick, but the "check engine" light is back on. :(

500

P0420 represents catalytic converter is operating below threshold. A lot of problems I have experienced is that the 10 to 20 % ethanol added to gasoline is causing issues with catalytic converters because of lower flash point of ethanol and also if turboed. It's worse because of higher exhaust temperatures. If turboed, always run high grade fuel and run it. You don't have to 100 mph. Just getting on interstate and running up to speed and let out. Do that a few times here and there. Don't have to do it all the time

Your Answer

Add photo

Related Questions

Impreza

Looking for a Used Impreza in your area?

CarGurus has 19,394 nationwide Impreza listings starting at $1,995.

ZIP:

Search Subaru Impreza Questions

Subaru Impreza Experts

#1 TheSubaruGuruBoston
TheSubaruGuruBoston
Reputation 710
#2 Nick Eidemiller
Nick Eidemiller
Reputation 460
#3 F_O_R
F_O_R
Reputation 430
View All

Related Models For Sale

Used Subaru Impreza WRX
47 Great Deals out of 1,277 listings starting at $3,000
Used Subaru Outback
363 Great Deals out of 42,353 listings starting at $1,100
Used Subaru Legacy
226 Great Deals out of 14,433 listings starting at $999
Used Subaru Impreza WRX STi
28 Great Deals out of 613 listings starting at $10,990
Used Subaru Forester
411 Great Deals out of 29,354 listings starting at $995
Used Honda Civic
814 Great Deals out of 88,107 listings starting at $1,299
Used Mazda MAZDA3
283 Great Deals out of 32,563 listings starting at $1,300
Used Honda Accord
948 Great Deals out of 77,739 listings starting at $899
Used Toyota Corolla
858 Great Deals out of 70,589 listings starting at $1,874
Used Toyota Camry
1,104 Great Deals out of 90,761 listings starting at $1,599
Used Ford Focus
627 Great Deals out of 57,258 listings starting at $795
Used Honda CR-V
920 Great Deals out of 59,346 listings starting at $1,990

Used Cars For Sale

2017 Subaru Impreza For Sale
4 Great Deals out of 13,971 listings starting at $14,206
2016 Subaru Impreza For Sale
39 Great Deals out of 829 listings starting at $15,044
2015 Subaru Impreza For Sale
24 Great Deals out of 667 listings starting at $11,495
2014 Subaru Impreza For Sale
55 Great Deals out of 1,178 listings starting at $8,345
2013 Subaru Impreza For Sale
22 Great Deals out of 648 listings starting at $6,490

Content submitted by Users is not endorsed by CarGurus, does not express the opinions of CarGurus, and should not be considered reviewed, screened, or approved by CarGurus. Please refer to CarGurus Terms of Use.