p0171
Moderate
Dodge · SUVs
System Too Lean (Bank 1)
Quick Answer
Error code P0171 on your Dodge SUVs means: System Too Lean (Bank 1). This is usually fixable — see the step-by-step guide below.
Affected Models
Likely Causes
How to Fix It
1
Connect OBD2 scanner and confirm P0171 code
2
Check for vacuum leaks using smoke test
3
Test oxygen sensor voltage with multimeter
4
Inspect fuel pressure with fuel pressure gauge
5
Replace faulty component as identified
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
Fuel pressure regulator
Fuel injectors
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