Check Engine Light - What do these codes mean? | Ford Explorer Forums - Serious Explorations

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Check Engine Light - What do these codes mean?

NJExplorerFan

Well-Known Member
Joined
May 29, 2009
Messages
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City, State
New Jersey
Year, Model & Trim Level
2015 Limited
I'm trying to figure out what codes I currently have pending on my '97 SOHC 4.0L V6 Explorer. I ran a scan a few moments ago and came up with the following 2 codes:

P0420 - Catalyst Efficiency Below Threshold, Bank 1
P0430 - Catalyst Efficiency Below Threshold, Bank 2

Any idea what this could mean? I thought maybe I needed a new catalytic converter, but maybe it's something else? How can I narrow this down as to my exact problem? Are there any other scanners out there that can break this down further (ie. Ford dealer)?
 






On a hunch, I pasted the code into google and got THIS
 






Turdle has a couple good threads on that here.

His suggestion was to switch the back o2 sensors, reset the computer and see if it throws a code again for the opposite side. If it does you know the sensor is bad.
 






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