96 460 code 172 ????
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96 460 code 172 ????
40 k on this moter runs like heck catches after 2 or 3 minutes on hiway then runs better parts store guy says code means running lean.....what do i start with here.....mike in omaha
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Joined: Oct 2005
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From: Kentucky
DTC 172 can be caused by any leaks in the exhaust system upstream of the O2 sensor. It can also be an indication you have a vacuum leak in the intake system as well. Low fuel pressure from a bad pump, faulty fuel pressure regulator or clogged filter can also cause a lean code. Once those potential causes have been eliminated it may be time to suspect a worn out or contaminated O2 sensor.
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1987 - 1996 F150 & Larger F-Series Trucks
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Apr 1, 2014 10:10 PM
