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Check engine light problem
Posted: Mon Jul 16, 2012 1:05 pm
by meteor
I have Pontiac vibe 2003.Last 5 months I have check engine light on.But last year I changed catalityc converter.Two days ago I was at emission and didnt pass.He told me that my catalitic converter is clean and he sold me some liquid to pour to tank ethanol like that.And it didnt help me too.Can you give some advice please
Re: Check engine light problem
Posted: Mon Jul 16, 2012 1:26 pm
by keithvibe
got to get the code read and post the results here before we can start to help.
Most any autoparts stores will read the codes for you.
Re: Check engine light problem
Posted: Tue Jul 17, 2012 3:55 am
by Bedlam
if you already changed your cat and end up with a P0420 code, your next stop is a new downstream 02 sensor. I just replaced mine on my 03 and was able to finally pass emissions.
If you still have troubles, you can use a non-fowler extension with a few bits of steel wool. This takes a little patience and drilling though to make work right. The cat and 02 sensor are your first stops though and will most likely fix 95% of the P0420 codes out there.
Re: Check engine light problem
Posted: Wed Jul 18, 2012 3:23 am
by meteor
from AutoZone:
Troubleshooting P0420
The oxygen sensors monitor the Catalytic Converters ability to store oxygen.
Probable cause
a1-Catalytic converter defective(failure possibly due to#2,3 or 4)
a2-Engine misfire or running condition
a3-Large vaacuum leak
a4-Engine oil leakage into exhaust-valve guide seals,piston rings
Re: Check engine light problem
Posted: Wed Jul 18, 2012 7:55 am
by MarkM66
Bedlam wrote:if you already changed your cat and end up with a P0420 code, your next stop is a new downstream 02 sensor. I just replaced mine on my 03 and was able to finally pass emissions.
If you still have troubles, you can use a non-fowler extension with a few bits of steel wool. This takes a little patience and drilling though to make work right. The cat and 02 sensor are your first stops though and will most likely fix 95% of the P0420 codes out there.
This code cam on in my '04, and I did the anti fouler trick. CEL never came back on.
IMO, a P0420 equals anti fouler trick.
Re: Check engine light problem
Posted: Thu Jul 19, 2012 5:43 am
by meteor
How to do anti fouler trick?
Re: Check engine light problem
Posted: Mon Jul 23, 2012 3:35 pm
by MarkM66
It's all over, here's one;
http://www.civicforums.com/forums/229-e ... -pics.html" onclick="window.open(this.href);return false;
Or search ebay for 02 extender, tons of them on there.