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2005 Acura TL Question: My engine check light came on and it said "Catalyst Threshold Efficiency Low."



mokim, 3.2L V6, Gardena, CA, January 03, 2013, 12:13

What does this mean? Someone please help!

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  • Answer #1

    Greg's Orange Auto (15171 Answers) , Orange, CA - (714) 361-9386
    globalhelper January 03, 2013, 16:03

    one of your catts is going bad did it say bank1 or 2 and per catt or post catt. it means you o2 sensors are not seeing enough difference between pre o2 and post 02 but u need to figure out if its an 02 issue or catt issue.rec seeing a mech that knows these cars for proper diag

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