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

525

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

UK Questions

Are you a UK consumer? CarGurus now has a discussion forum in the UK.

Dodge Ram 2500 Experts

#1 Dan Connell
Dan Connell
Reputation 2,070
#2 Ram2500Diesel
Ram2500Diesel
Reputation 550
#3 AJBurns
AJBurns
Reputation 440
View All

Related Models For Sale

Used Dodge Ram 3500
93 Great Deals out of 2,320 listings starting at $5,000
Used Ford F-250 Super Duty
470 Great Deals out of 43,396 listings starting at $2,750
Used Chevrolet Silverado 2500HD
396 Great Deals out of 27,337 listings starting at $2,998
Used Dodge Ram 1500
518 Great Deals out of 13,131 listings starting at $1,800
Used GMC Sierra 2500HD
152 Great Deals out of 13,288 listings starting at $3,500
Used Ford F-150
3,136 Great Deals out of 208,989 listings starting at $1,200
Used Chevrolet Silverado 1500
2,608 Great Deals out of 152,726 listings starting at $1,500
Used Ford F-350 Super Duty
438 Great Deals out of 26,419 listings starting at $2,999
Used Chevrolet Silverado 2500
8 Great Deals out of 290 listings starting at $3,995
Used Toyota Tundra
660 Great Deals out of 28,450 listings starting at $2,798
Used GMC Sierra 1500
1,005 Great Deals out of 60,427 listings starting at $1,299