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Catalytic converter trouble

Tiny
HERBERT MARTIN
  • MEMBER
  • 2009 DODGE CARAVAN
  • 1.8L
  • 6 CYL
  • FWD
  • AUTOMATIC
  • 118,500 MILES
I have codes P0420 and P0420 P/D. I replaced the converter about three months ago and its starting to cause the light to come on again. Where would I start to trouble shoot the problem? The old catalyst is not clogged up completely on any part of the catalytic converter or broken any where.
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Wednesday, July 20th, 2016 AT 6:57 PM

1 Reply

Tiny
HMAC300
  • MECHANIC
  • 48,601 POSTS
Looking at the catalytic converter is really not a good way of seeing whether they are bad or not. Check for air leaks /maybe a bad O2 sensor, or a O2 sensor that was replaced but is not really a good sensor.
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Thursday, July 21st, 2016 AT 6:01 AM

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