2014 Ford Explorer Sport 3.5 Boost - P0420 Catalyst System Efficiency Below Threshold

barney94

Joined: Dec 13, 1999

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Just rolled over 100k miles, got a check engine light and pulled this code.

What should I expect as far as a repair bill from a decent independet mechanic?

Any problem with driving it as-is for a little while?

fixer

Joined: Aug 21, 2005

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2:51p, 6/16/20

No problem driving it at all.

Could be secondary o2 sensor fault and not necessarily a catalytic converter problem.

1agswitchin4lanes

Joined: May 8, 2001

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3:21p, 6/16/20

Driving is fine.

Really need to check the long term fuel trims and Oxygen sensor voltages, compare left and right banks before just throwing parts at it to fix.

barney94

Joined: Dec 13, 1999

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3:58p, 6/16/20

Thanks guys, appreciate it

Complete Idiot

Joined: Feb 21, 2013

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8:45a, 6/17/20

You have no other choice but https://www.livernoismotorsports.com/product/LPP0114739

barney94

Joined: Dec 13, 1999

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9:10a, 6/17/20

Thanks for the suggestion...guess I better sell a kidney