I have a 2006 Dodge 2500 hemi 5.7 its throwing a code P0420 which is the catalyst system. I have had the catylac converter on bank 1 changed, I have also replaced all 4 O2 sensors.

Asked by Sep 29, 2015 at 10:37 PM about the 2006 Dodge Ram 2500 SLT 4dr Quad Cab 4WD SB

Question type: Maintenance & Repair

This all started after I had a magnaflo
muffler put on and 4 manifold bolts
replaced.

1 Answer

535

po420 means catalyst efficiency. if factory parts were not used there is your problem . you should only be concerned with the two o2 sensors after the cat. or knowing chrysler a soft ware up date. the parameters in newer models are very tight, in the pcm

Your Answer

Add photo

Related Questions

  • Where Oxygen sensor bank 1 location ram 2500 5.7 2 answers

    2006 Dodge Ram 2500 Laramie 4dr Quad Cab 4WD SB

    -

    Maintenance & Repair

  • Problems to start the engine once is warm of my Ram 2007 HEMI 5 answers

    Hello guys, I have a Ram 2007 with a hemi engine. The problem that we are facing is once the engine is warm the truck don´t wan´t to start again until she get cool. Once the engine is cool no proble...

    2007 Dodge Ram 2500

    -

    Maintenance & Repair

  • Injection Pump and trouble Codes 22 answers

    So, Last week my injection pump went out. and thank God I still have a warranty on it cause it's a 2,000 dollar part. But is there a specific reason these go bad? cause this is the thrid one on this t...

    2000 Dodge Ram 2500 4 Dr SLT 4WD Extended Cab LB

    -

    Maintenance & Repair

  • fuel and throttle power loss 17 answers

    Loss of power after warm up. Sounds like engine gasping for air...definitely stops combustion at twenty percent throttle. No clogged Cat. New plugs. New air filter. Injectors clean. New TPS...MAP...

    1994 Dodge Ram 2500 Laramie SLT Standard Cab LB

    -

    Maintenance & Repair

  • poor mpg 13 answers

    i got a 2005 ram 2500 with a 5.7 hemi ,is there any way to increase fuel milage only gettinf around 11mpg thanks

    2005 Dodge Ram 2500

    -

    Car Customization

Search Dodge Ram 2500 Questions

Dodge Ram 2500 Experts

#1 Dan Connell
Dan Connell
Reputation 2,100
#2 Ram2500Diesel
Ram2500Diesel
Reputation 550
#3 AJBurns
AJBurns
Reputation 460
View All

Related Models For Sale

Used Dodge Ram 3500
99 Great Deals out of 2,306 listings starting at $5,999
Used Ford F-250 Super Duty
427 Great Deals out of 45,049 listings starting at $2,000
Used Chevrolet Silverado 2500HD
357 Great Deals out of 26,069 listings starting at $2,500
Used Dodge Ram 1500
535 Great Deals out of 12,998 listings starting at $2,199
Used GMC Sierra 2500HD
154 Great Deals out of 13,588 listings starting at $3,450
Used Ford F-150
2,884 Great Deals out of 212,656 listings starting at $1,000
Used Chevrolet Silverado 1500
2,307 Great Deals out of 156,238 listings starting at $1,395
Used Ford F-350 Super Duty
421 Great Deals out of 27,133 listings starting at $2,999
Used Chevrolet Silverado 2500
11 Great Deals out of 327 listings starting at $3,995
Used Toyota Tundra
626 Great Deals out of 30,696 listings starting at $2,637
Used GMC Sierra 1500
931 Great Deals out of 62,271 listings starting at $1,395