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Trouble code 172 help

1987 - 1996 F150 & Larger F-Series Trucks 1987 - 1996 Ford F-150, F-250, F-350 and larger pickups - including the 1997 heavy-duty F250/F350+ trucks

Trouble code 172 help

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Old

Feb 7, 2012 | 01:26 PM

#1

xc4jokestomper

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From: Charleston

Trouble code 172 help

I got a check engine light today and came home to check it and got code 172. Engine running lean and oxygen sensor not switching? What's this mean? I need a new oxygen sensor? It's less than 2 years old? I did drop down just a tad bit this week in gas mileage though..

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Old

Feb 7, 2012 | 05:02 PM

#2

rla2005

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Joined: Oct 2005

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From: Kentucky

A vacuum leak or any leak in the exhaust system upstream or close by the O2 sensor can trigger Code 172.

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150, 172, 1992, 1996, 49, 92, aerostar, code, engine, f150, ford, trouble

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