p0174
Moderate
Ford · SUVs
System Too Lean Bank 2
Quick Answer
Error code P0174 on your Ford SUVs means: System Too Lean Bank 2. This is usually fixable — see the step-by-step guide below.
Affected Models
Applies to all models
BRNCOBRNCSEDGEESCPEEXPDNEXPLREXPLRHBronco Badlands 2024Bronco Base 2024Bronco Big Bend 2024Bronco Raptor 2024Bronco Sport Badlands 2024Bronco Sport Base 2024Bronco Sport Big Bend 2024Bronco Wildtrak 2024Escape Active 2024Escape Platinum 2024Escape ST-Line 2024Expedition King Ranch 2024Expedition Limited 2024Expedition Platinum 2024Expedition XLT 2024Explorer Base 2024Explorer Limited 2024Explorer Platinum 2024Explorer ST 2024Explorer XLT 2024MACHE
Likely Causes
How to Fix It
1
Perform a smoke test on the intake system to find vacuum leaks
2
Clean or replace the MAF sensor
3
Test fuel pump pressure and volume
4
Inspect and replace PCV valve if faulty
5
Monitor upstream O2 sensor on bank 2 with a scan tool and replace if sluggish
Pro Tip
This fix requires some technical knowledge. If you're unsure about any step, consider contacting support or a qualified technician.
Parts You May Need
MAF sensor
PCV valve
Vacuum hose kit
Upstream O2 sensor (bank 2)
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