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1997 Jeep Cherokee Getting P420 Code

Tiny
DPLOOF
  • MEMBER
  • 1997 JEEP CHEROKEE
Other Category problem
1997 Jeep Cherokee 4 cyl 81000 miles

Need to know what to look for with an OBDII P420 code
Saturday, December 22nd, 2007 AT 6:01 PM

2 Replies

Tiny
MERLIN2021
  • MECHANIC
  • 17,250 POSTS
Bank 1 catalyst effeciency below threshold.
Check the converter for a broken bed. Tap on it with a rubber mallet or perform a backpressure test on the exhuast!
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Saturday, December 22nd, 2007 AT 6:36 PM
Tiny
SERVICE WRITER
  • MECHANIC
  • 9,123 POSTS
YEah Merlin is right, most often you'll find the solution to be a bad cat.
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Sunday, December 23rd, 2007 AT 11:37 AM

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