Question about 1999 Dodge Durango

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Check engine light came on for code p0429

I checked with a scanner and the code says somthing to do with the cat. Does this code meen that my cat is bad?

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Need the code before I can answer this, was it P0420?

Posted on Jul 01, 2009

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Waht was code 430 more dsthan like it ur cat. left or right will tell you which one

Posted on Jul 01, 2009

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WHAT CODE DOES IT HAVE??
IT PROBABLY SAYS CATYLYST OR SOMETHING TO THAT EFFECT!!
COULD BE THE CAT OR COULD BE A PROB WITH ONE OF THE O2 SENSORS!!

Posted on Jul 01, 2009

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Posted on Jan 02, 2017

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The actual problem could be an exhaust leak closer to the engine, or that new cat may not be up to oem standards.

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I have check engine light on and whe i checked the code is p4029


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A three way catalyst converter (Manifold) with high oxygen storage capacity will indicate a low switching frequency of heated oxygen sensor 2. As oxygen storage capacity decreases, the heated oxygen sensor 2 switching frequency will increase.



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Check engine light is on. Code is showing P0420. What does this mean?


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O2 SENSORS ARE BAD MOST LIKELY I WOULD CHANGE THEM DISCONNECT THE BATTERY FOR 5 MIN. ( IF YOU DONT HAVE A SCANNER) THIS WILL RESET YOUR COMPUTER AND SHOULD MAKE THE SERVICE ENGINE LIGHT GO OUT.

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A sound that's coming from the bottom of the car


If its a sort of rattling it could be that the cat has broken up inside. You would have to get the car up and secure enough to dunt the exhaust with your hand listening for any rattles around the cat area. Make sure exhaust is cold first. Catalytic converters get well hot. It may just be some heat shielding around downpipe area or cat. If the problem is linked to a broken up cat the lambda sensor may be faulty to. Might be completely seperate though so best fix rattle first then find someone who has a code reader. You can buy OBD scanners fairly cheap on ebay and the likes if need be.

cheers John

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