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Q:

i have to codes in my jeep on 2003 Jeep Liberty

Rookie cbe0621eac06868b3efe0d8d1d3611e23c60d3114864ea2ec19a68cfbd3eebab
codes are P0 442 and 420
(1) Answer
2 issues.
420 could be a bad cat. would have to confirmed witha diag.

442 is an evap code that needs a diag too.
you need a shop to confirm and give you a bid.

Roy