Question about Dodge Ram 2500

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2006 ram 2500 5.7l Low catalyst efficiency and every 02 code there is probably. I brought to a dealer for an expert diagnosis after changing both down stream o2 sensors. They charged me 89.50 and said they would change one convertor and one upstream o2 for a some of 1495.00. I declined and had true duals from manifold back installed w/ two new heavy metal magnaflow convertors and two new bosch upstream 02. I cleared the code w/ my reader and my check engine light came back on w/ a o2 code. Any ideas?

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6 Suggested Answers

6ya6ya
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Posted on Jan 02, 2017

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jmeyer847
  • 185 Answers

SOURCE: PO420 code for 2003 Elantra

Danny,

Catalytic Converter Failure is a common cause of a P0420 Code. 1.) I would give a few calls to some muffler shops and get a thorough exhaust inspection done. As a leaking/damaged Exhaust Manifold, Catalytic Converter, or exhaust pipe could be some of the culprits as well. If it were any of those other items your car would give you a different OBD Code. Item #2.) This is not common with a P0420 Code. With the P0420 code you should have no driveability issues. (not to say that you wouldnt in an extreme rarety) Item #3.) Again this would flag an entirely different code such as P0455 (Large Evap Emission Leak) Item#4.) Engine Oil would not even set a code. I hope this helps you out, and thank you for using FixYa!

Sincerely,

JC

Posted on Nov 19, 2008

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emissionwiz
  • 76846 Answers

SOURCE: 1997 LINCOLN TOWN CAR - CHECK ENGINE LIGHT( code P430)

I think you will find the aftermarket Cat Conv. is the source of your problem, but without hooking up to the factory test equipment at my disposal at my Ford dealer this at best and educated guess based on 20 years of emission related work, I am a Ford certified master electronics technician

Posted on Jan 30, 2009

ewashmidas
  • 362 Answers

SOURCE: Service engine light,code po 420

A good brand name direct fit converter should keep the light off as long as the cause of the first converter failure is corrected. I would not use a universal fit one. Walker is a good brand, I have used them and never had a problem. Here is some more information, hope this helps.

When diagnosing a PCM code or codes: P0420, P0430, be sure to determine the cause of the converter failure. These converters are not likely to fail without an external cause. Typical causes are: fuel pressure regulator leak, engine misfire, dirty fuel injectors, coolant consumption, etc. Also, be aware that some converters on the market will cause this code or codes due to a lack of oxygen storage capacity. A component that must be in these converters, Cerium, is required to store, then slowly release oxygen. NOTE: P0420 is a bank 1 converter code, P0430 is a bank 2 converter code. If the vehicle has only one converter, then P0430 does not apply.

Posted on Feb 19, 2009

daves944
  • 1050 Answers

SOURCE: CATALYTIC CONVERTOR - BANK 2

You have a V6 engine, bank one is the row of cylinders on the passenger (right) side, bank two is the row of cylinders on the drivers side (left). Your codes indicate an inefficiency in the cat on the left side but this could be due to a bad O2 sensor or an engine that is out of tune and overloading the cat. This car seems too new to have a bad cat. I would change the plugs and the O2 sensor after the cat before going any further. The reason I say the O2 after the cat, it's the one that is critical in sensing cat efficiency. What is the mileage?

Posted on Mar 26, 2009

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SOURCE: i have a chrysler 300

I have no power to my 300m 2002. Battery has been tested ,charged and replaced and I have no power. What else can I trouble shoot to solve this problem?

Posted on Nov 05, 2009

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I have a p0420 code on my 2010 Jetta, already changed my 02 sensor. the car has only 70k miles on it, should I change the CAT or look at something else?


I wood look at somin else clear the code if it comes back then we should seewhat we can do as anything Changes since it has been on ? Let me Know thks for your time

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the 02 and efficiency sensors hav issues or are sending the computer problems w the converter--may need a new one-dont buy aftamarket-original only

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Code p431 and p421


P421=Warm up catalyst system efficiency below threshold, bank 1
P431=Warm up catalyst system efficiency below threshold, bank 2
Sounds like you may have clogged or damaged catalyst converters or bad 02 sensors.
Those codes I think are taking from after the catalyst by the sensors in the exhaust pipes. Be careful taking it to a mechanic for further checking since the catalyst converters are not cheap through them. If you need to replace the converters, shop around and get prices on aftermarket parts. Don't be ripped off by a hungry mechanic or especially a dealer.

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I got a diagnostic test and came up code p0420. what should i do to fix the code for it to pass ommissions test?


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Check engine light on. took the car to auto zone to put it on a scanner. trouble code p0420. catalyst system efficiency below threshold. probable cause; large vaccum leak, fuel system fault, ignition...


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Jeep 2008 Commander 5.7 code p0430 What does this code mean? Thanks,


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Sounds as if yoou are actually having a fuel system problem.You need to rreplace the fuel filter and then check the fuel pressure. You should have around 50 psi. If the fuel filter stops up it will cause the exhast to starve for fuel and can damage a catalyst converter. You can get the fuel filter for about 15 dollars at any local parts house.

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Engine light came on. The dealership said it was diagnostic code P0420 and that it would cost @ $1,200.00 to repair. This seem pretty high. What is this diagnostic code about and is the repair rate


Hi, this code represents a Catalyst System Efficiency Below Threshold (Bank 1). and the repair, considering that it will be repaired by the dealership, seems to be in the normal cost range. The labor is what usually inflates the price when dealing with catalytic replacements.

You could probably get a better deal by taking it to a non dealership type of repair shop. This may cut at least 200 dollars of the original dealership quote.

Please rate and god bless:)

Apr 14, 2009 | 2005 Subaru Outback

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