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Engine code help

philskents

NAXJA Forum User
Location
Illinois
Hi All,

My "everything is just fine light" came on the other day, the code readout gave me "P0432 Main Catalyst Efficiency Below Threshold (Bank 2)".

I am running a stock 2001 XJ. Any ideas where I can start troubleshooting?
 
Hi All,

My "everything is just fine light" came on the other day, the code readout gave me "P0432 Main Catalyst Efficiency Below Threshold (Bank 2)".

I am running a stock 2001 XJ. Any ideas where I can start troubleshooting?

Had that code in my '00 with CA Emissions. There are other things that could be causing it. Exhaust leaks, fuel trims, O2 sensors. Spent awhile ruling out those as best I could without throwing parts at the Jeep. I went for the cat. Just so happened I needed a new muffler and tailpipe anyway so I bit the bullet and replaced the whole exhaust with Walker parts. Problem solved for me anyway.
 
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