Scan tool shows P0174 System Too Lean (Bank2). I can't find it to replace.
Feb 3, 2025 at 8:04 AM
Code P0174, where is the upper 02 Oxygen sensor located?
1999 FORD F-550
JDA2025
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I have seen the MAF sensor need to be replaced and cause this code FYI. I can also be a vacuum leak. Chances are the oxygen sensor replacement will not fix the issue, but you can give it a shot. Please go over this guide which will show you the causes of a lean mixture:
https://www.2carpros.com/articles/repair-lean-mixture-codes-p0171-or-p0174-on-some-manufacturers
The P0174 code indicates that the ECM (Engine Control Module) has detected a lean condition on Bank 2
Here is the location of the sensor as requested which will be the first sensor on the left side of the engine. Check out the images (below). Please let us know what happens.
https://www.2carpros.com/articles/repair-lean-mixture-codes-p0171-or-p0174-on-some-manufacturers
The P0174 code indicates that the ECM (Engine Control Module) has detected a lean condition on Bank 2
Here is the location of the sensor as requested which will be the first sensor on the left side of the engine. Check out the images (below). Please let us know what happens.
Images (Click to enlarge)
Feb 4, 2025 at 10:02 AM
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