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SES light on, Catalyst low efficiency bank 1????

cacicgtp7

Some Military Dude
Joined
Nov 9, 2008
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Got a check engine light last night, and went to a local auto parts dealer to check what the code was. Came up P0204....something, can't remember, but it said catalyst low efficiency....

Now does this mean my cat is clogged or what? And is this something i need to take it in for or i can do myself. Car is still under warranty, i did clear the code for peace of mind but it's back again today, same thing. If it's a serious problem or is this just because i have a DHP in my car? It's on a 2005 Compg fyi, and i haven't had a code, but have had the dhp in the car for about a month now.


John
 

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