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Re: What is PO420 code
It sounds like the catalytic at bank one where the number one cylinder is might be bad but it could be the 02 sensor also
have the catalitic test or removed from a mufler shop and have them inspect it iside for damage
if it is bad then replace it,
you can also top on it if you hear like little rocks inside that means is not good and must to be repalced
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One of the most annoying is the persistent PO420 diagnostic code (Catalyst System ... not only shows its teeth when the catalytic converter is on the blink, but can also be ... Most, if not all, catalytic converter failures are caused by a problem or ...
Repair information for the OBD-II trouble code P0420 - Catalyst System Efficiency ... If they have failed, it is likely due to something else that caused it to fail. ... the catalytic converter is broken or failed, it may be restricting the exhaust which will ...
clogged catalytic converter, replace it with a new one, or remove old one, use a long pipe and punch a hole through it, empty out the pieces, and reinstall. That will work if you don't get the sniffer stuck on your exhaust during emissions testing, as your emissions will be very high using my pipe through the converter method.
that is the code for the catalytic convertor. it is either bad or not working at optimal levels. In most cases this in not such a big deal unless you live in a state that does emission testing buy pug in and not tail pipe emissions. Most states now use a quick OBD II plug-in
test to check emissions compliance on 1996 and newer vehicles. The
plug-in test is faster, easier and cheaper to do than a loaded mode
tailpipe emissions test on a road simulator or dynamo-meter. The rules
in most states say to pass the OBD II plug-in test, the vehicle (1) must
have a fully-functional OBD II system (Check Engine lamp works and the
diagnostic connector communicated with the engine computer), that the
Check Engine light must be off and that there are no
current codes in the computer's memory. If this is the case than you're going to have to replace the converter.
For the lean condition I wound look for vacuum leaks.I you don`t find any then replace the o2 sensor for bank 1.As for the po420 if the exhaust system is not bent or damaged you will have to replace the catalytic converter.The catalytic converter has a longer warranty then the regular vehicle warranty itself so call the dealership and find out if the converter is still under warranty.The usual warranty I believe is around 80k.mileage years is 7 or 8 not positive.Hope this helps.Good luck.
PO420 code is for catalyst system efficiency below threshold (bank 1) Usually it means that it is time for a new catalytic converter on bank number 1. Cylinder bank number 1 is always the bank with the number 1 spark plug in it.
po420 is catalytic converter efficiency. You will have to replace it to keep the light off. But as long as you live in a state that doesnt require emission test you can ignore it and it won't effect the way the van runs
You're going to have to have the codes read and find out what is setting that light on. After that problem is repaired, the car must indeed complete a drive cycle, not nessacarily 200 miles. This lets the computer run all it's tests and set all its readiness monitors. If you know what the code number is now, post it and I'll tell you the most likely cause, and repair.
In almost all cases, a P0420 code indicates a problem with 1 or more O2 sensors. They send incorrect emissions information back to the ECM and trigger the Check Engine Light. If the Catalytic Converter is fine (no problems with the engine hesitating or getting a lot of heat from under the car) then it's most likely the O2's.