Check Engine Light
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Posting Guru
Joined: May 2001
Posts: 1,021
Likes: 1
From: Florida
Check Engine Light
Hey I had the codes pulled and it says lean condition in both banks. What could this be? The truck hasn't seemed to change the way it's running, but the light came on.
Laughing Gas
Joined: Mar 2003
Posts: 943
Likes: 2
From: Randolph, NJ
Some threads of possible interest I found with a search of "lean both banks":
<a href="https://www.ford-trucks.com/forums/archive/index.php/t-422939-DTC%200174%20and%201443%20-%20Poor%20gas%20mileage">DTC 0174 and 1443 - Poor gas mileage</a>
<a href="https://www.ford-trucks.com/forums/archive/index.php/t-419682-97%20Ranger%20Running%20Lean%3F">97 Ranger Running Lean?</a>
<a href="https://www.ford-trucks.com/forums/archive/index.php/t-409139-Code%20says%20running%20lean">Code says running lean</a>
Most of these are for 97 4.0's. It would help to know your truck year and engine and the exact codes.
Good Luck,
Jim
<a href="https://www.ford-trucks.com/forums/archive/index.php/t-422939-DTC%200174%20and%201443%20-%20Poor%20gas%20mileage">DTC 0174 and 1443 - Poor gas mileage</a>
<a href="https://www.ford-trucks.com/forums/archive/index.php/t-419682-97%20Ranger%20Running%20Lean%3F">97 Ranger Running Lean?</a>
<a href="https://www.ford-trucks.com/forums/archive/index.php/t-409139-Code%20says%20running%20lean">Code says running lean</a>
Most of these are for 97 4.0's. It would help to know your truck year and engine and the exact codes.
Good Luck,
Jim
Lead Driver
Joined: Jul 2004
Posts: 5,946
Likes: 62
From: in the woods of MA
Both banks lean usually means a fuel delivery problem. Low fuel pressure, bad MAF sensor, or vacuum/intake manifold leak, to name just a few. Sometimes they're obvious - a bad PCV will do it - but sometimes they're very subtle. If the fuel pressure is good and there are no other codes, I'd have the intake manifold smoke tested... Good luck.
