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Old 10-18-2012, 05:50 PM
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ramvan2500 ramvan2500 is offline
Dodge Ram Forum Senior Member
Join Date: Apr 2011
Location: Florida USA
Posts: 1,981
Gender: Male
Vehicle: 1995 Dodge Ram B2500 Van
Trim Level: SLT - 2500
Color: Deep Molten Pearl Coat, Silver, Grey
Engine: 1994-2001 318ci (5.2L) Magnum V8 220hp
Rep Power: 7
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Originally Posted by BigManMopar View Post
IV got a 1998 dodge ram 1500 4x4 with a 318...just recently I pulled the motor apart and did head gaskets and intake runs great and then the other day I got a P0420 code saying low catalyst efficiency bank one and I'm not sure if the O2 sensor is shot or if my catalytic converter messed up when the truck is running I can hear what sounds like something clapping around inside the catalytic converter. Anybody know anything that would help me diagnose the there a way to re-calibrate the O2 sensor?
Sounds like your cat has finally died, but a clapping sound could be an exhaust leak. But with the age of the truck and all...
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