p0174
Moderate
RAM · Trucks
System Too Lean Bank 2
Quick Answer
Error code P0174 on your RAM Trucks means: System Too Lean Bank 2. This is usually fixable — see the step-by-step guide below.
Affected Models
Likely Causes
How to Fix It
1
Connect OBD-II scanner to confirm code
2
Perform visual inspection for vacuum leaks
3
Test oxygen sensor Bank 2 with oscilloscope
4
Inspect air filter and clean or replace if necessary
5
Replace faulty oxygen sensor if voltage is incorrect
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
Oxygen sensor Bank 2
Air filter
Vacuum hose
Mass airflow sensor
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