Question about 2001 Dodge Durango

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Have a 420 trouble code. Is this a serious problem or do I have a lttle time to get it fixed? THANKS MIKE

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This code may cause poor gas mileage and also may get the catalytic converter very hot. After the car has warmed up and with the engine running, look under the car at the catalytic convereters to see if they are glowing hot.

Posted on Sep 10, 2010

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What to do to fix a 420 code


420 is a catalytic converter afficiency code. It could cause by many problems: bed fuel, old spark plugs, sensor wiring connection. I would replace plugs and fill with premium fuel, turn off the code and drive to see if it comes back. If it does, stop by any muffler shop and have them run cleaner threw your system, it may give you 5 to 6 month driving but sooner or later you will need new cat for your car. Hope it helps.

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I just had alot of work done on my 2000 beetle and now a yellow light that looks like the shape of the car with a lttle key is coming on. Also a blue temp gauge light comes on in the morning. What do these...


I would have the car rechecked for codes. The blue temp gauge light, may have something to do with the cooling system.

I would definitely have it checked by the dealer or the last place it was serviced in order to see how serious the problems are.

I don't think it's not a big deal, but anytime there are warning lights that go on for an extended period of time, there is potential for a more serious break down at an inopportune moment.

So, have it checked out.

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You will find a bad O2 Sensor behind the converter or a bad catalytic converter on the bank 1 side of the exhaust manifold. This is the one on the drivers side.

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