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P0174 Diagnostic Trouble Code Discussion for April 2024

Fuel System Lean (Bank 2)

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Trouble Ticket Help Requests for DTC P0174
Help Request Posted
2003 Mazda B4000 SE 4.0L Misfire, MIL Lamp on, Extreme lean VIN: 4F4ZR47E13
P0174: Adaptive Fuel Trim Too Lean (Bank 2). I'm at a bit of a loss here due to conflicting data. Not sure if I'm overlooking something, but I suspect the computer is the issue. It came in with an extreme lean condition both banks, at times around 45% ST which is higher than anything I recall seei...
April 04, 2024