Left Bank Lean Error code

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11-12-2009, 07:27 AM

psu1xj

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Left Bank Lean Error code

Hi guys!

While picking my '01 F150 (4.2/M5OD) up after inspection last night I got a service engine soon light.

It's telling me "Left Bank Lean -- 0174"

What should I look at first?

Thanks!

-Sam

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11-15-2009, 03:15 AM

bokker

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hi, first thing i would look for is a vacuum leak, bokker.

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11-16-2009, 08:14 AM

BrianA

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+1 look for a vacuum leak first. Most simple and I believe most common.

Here is a little more info:

https://www.ford-trucks.com/forums/8...-too-lean.html

Ford P0171 & P0174 Lean Codes

Best of luck and let us know what you find.

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