Cat converter light back on

40

Asked by Aug 21, 2016 at 02:57 PM about the 2007 Dodge Ram 1500 SLT Quad Cab 4WD

Question type: Maintenance & Repair

New cat converter system , 4 oxygen sensors new,
new canister.light came back on after 4 months
180,000 miles 2007 truck runs great .ac pulls
power when on
Trans,oil, radiator  flushed  what am i missing? 4.7
flex fuel engine.

11 Answers

247,025

What is the 4 digit code you are getting?

1 of 1 people found this helpful.
40

Bank 2

68,695

We need the trouble code. P0420, for example is a valid trouble code. It'll be a "P" followed by four digits. -Jim

40

P0441 incorrect purge flow

1 of 1 people found this helpful.
68,695

That has nothing to do with the catalytic converter or the oxygen sensors! This is a problem with the EVAP system. Most likely cause is a faulty purge valve. HTH. -Jim

1 of 1 people found this helpful.
40

Sorry that code was at 185,000 this is the latest one at 189, 000 P 0430 cat system efficiency below threshold (Bank 2)

1 of 1 people found this helpful.
68,695

Oh, ok. Did you check the emissions decal under the hood before replacing the converter the first time? If it says "conforms to California emissions standards" or "is C.A.R.B. compliant" you have California Emissions and a special catalytic converter is required. Even if you do not live in California you may still have California Emissions. My '03 S-10 Pick Up was originally delivered to Delaware and has California Emissions. So does my 2000 Grand Prix which was originally delivered to New Jersey. A Federal Emissions converter will not last for long on a California Emissions vehicle. You need a converter that is C.A.R.B. compliant if that's the case. HTH. -Jim

40

Okay I checked under the hood and this is what it read. This vehicle conforms to US EPA interm 2 bin 8 regulations applicable to flex fuel 2007 model year new light-duty trucks and meets us EPA clean fuel fleet lev vehicle regulations this vehicle is certified to operate on unleaded gasoline or an unleaded gasoline / ethanol blend containing up to a maximum of 85% ethanol

1 of 1 people found this helpful.
68,695

Ok, good. Sounds like you don't have California Emissions. When buying the new converter, tell the parts person or service writer that information. There are a few things you should know to prevent this kind of premature failure again. First, bank 2 is the side of your engine that cylinder number 2 is on. So whichever side that is (driver's side or passenger's side) that's the converter that's throwing the code and needs to be replaced. Second, I always recommend Eastern Converter. They have a very informative website including videos! Before I went to work for NAPA I worked at another auto parts store chain for about 5 years until they went bankrupt. All we sold were Eastern Catalytic Converters. I honestly don't remember any coming back defective! They're an excellent converter. I've had an Eastern converter on my '03 S-10 Pick Up since 2011 and one on my 2000 Grand Prix since 2013. No issues with either one to date. Third, a brand new, never used, catalytic converter has to be warmed up before it's placed into service. This is done by holding the engine at a fast idle for several minutes once the converter is installed on the vehicle. This melts the catalyst (honeycomb, or brick as it's sometimes referred to) into place. Without doing that the "brick" will be damaged as soon as you drive the vehicle for the first time after the installation. This will greatly reduce the service life of the converter. Eastern Converter has a video on their website that explains this in more detail with pictures. Lastly, most catalytic converter failures are caused by engine trouble. Misfiring, burning oil, and coolant leaking internally are the 3 most common causes of converter failure. So make sure you have no issues with the engine before replacing the catalytic converter! There are other causes of converter failure such as thermal shock. But these instances are rare. Thermal shock happens when you drive through freezing cold water and the converter, which is about 500°F gets soaked with the freezing cold water. It can happen, but it's rare. Check out those videos on Eastern's website. HTH. -Jim

2 of 2 people found this helpful.
40

Thanks

1 of 1 people found this helpful.
68,695

You're welcome. Glad to help. -Jim

Your Answer

Add photo

Related Questions

  • Cat converter light back on 11 answers

    New cat converter system , 4 oxygen sensors new, new canister.light came back on after 4 months 180,000 miles 2007 truck runs great .ac pulls power when on Trans,oil, radiator flushed what am i ...

    2007 Dodge Ram 1500 SLT Quad Cab 4WD

    -

    Maintenance & Repair

  • Truck purs like a cat when turning on. Engine Light comes on, blinks, then stays on. Is there a typical problem associated with these issues? 1 answer

    Apparently the three main problems with it is the codes were wiped so it took a while of driving before it came on, needs new ball joints, and there's a misfire in the engine, if you give it some ga...

    2007 Dodge Ram 1500 SLT Quad Cab

    -

    Maintenance & Repair

  • engine light on 1 answer

    The engine light is on - the engine seems to be running well

    2006 Dodge Ram 1500 ST Quad Cab SB 4WD

    -

    Maintenance & Repair

  • Light on dash 3 answers

    This light just started randomly coming on. When it does if I put it in park I can't shift gears out unless I turn off vehicle. The traction control on/off is on the other side of the dash. Any su...

    2010 Dodge Ram 1500 SLT Quad Cab

    -

    Maintenance & Repair

  • Engine Light Comes on 3 answers

    2007 dodge ram 1500 quad cap 5.7 liter The engine light came on. Went to the auto zone and they told me the code. was to replace the oil sensor switch. I did and the light came on. I disconnected the ...

    2007 Dodge Ram 1500 SLT Quad Cab

    -

    Maintenance & Repair

Ram 1500

Looking for a Used Ram 1500 in your area?

CarGurus has 10,886 nationwide Ram 1500 listings starting at $1,000.

ZIP:

Search Dodge Ram 1500 Questions

Dodge Ram 1500 Experts

#1 Dan Connell
Dan Connell
Reputation 6,270
#2 pudgybear
pudgybear
Reputation 6,130
#3 dandyoun
dandyoun
Reputation 5,510
View All

Related Models For Sale

Used Ford F-150
2,088 Great Deals out of 192,330 listings starting at $290
Used Chevrolet Silverado 1500
1,935 Great Deals out of 182,327 listings starting at $999
Used Dodge Ram 2500
116 Great Deals out of 5,079 listings starting at $2,999
Used GMC Sierra 1500
792 Great Deals out of 68,001 listings starting at $1,700
Used Toyota Tundra
415 Great Deals out of 34,266 listings starting at $1,950
Used Toyota Tacoma
548 Great Deals out of 42,266 listings starting at $1,995
Used Dodge Charger
535 Great Deals out of 28,457 listings starting at $2,500
Used Ford F-250 Super Duty
330 Great Deals out of 43,931 listings starting at $1,450
Used Dodge Dakota
119 Great Deals out of 3,783 listings starting at $1,500
Used Nissan Titan
175 Great Deals out of 18,876 listings starting at $3,995
Used Dodge Challenger
259 Great Deals out of 22,333 listings starting at $7,995
Used Ford Mustang
682 Great Deals out of 44,475 listings starting at $1,500
Used Chevrolet Colorado
250 Great Deals out of 27,517 listings starting at $1,000
Used Dodge Ram 3500
72 Great Deals out of 2,100 listings starting at $6,969

Used Cars For Sale

2010 Dodge Ram 1500 SLT Quad Cab 4WD For Sale
7 Great Deals out of 209 listings starting at $10,000
2009 Dodge Ram 1500 SLT Quad Cab 4WD For Sale
8 Great Deals out of 172 listings starting at $7,999
2008 Dodge Ram 1500 SLT Quad Cab 4WD For Sale
12 Great Deals out of 371 listings starting at $6,600
2007 Dodge Ram 1500 SLT Quad Cab 4WD For Sale
23 Great Deals out of 373 listings starting at $4,995

Content submitted by Users is not endorsed by CarGurus, does not express the opinions of CarGurus, and should not be considered reviewed, screened, or approved by CarGurus. Please refer to CarGurus Terms of Use.