p0171
Moderate
Genesis · SUVs
System Too Lean (Bank 1)
Quick Answer
Error code P0171 on your Genesis SUVs means: System Too Lean (Bank 1). This is usually fixable — see the step-by-step guide below.
Affected Models
Applies to all models
Likely Causes
How to Fix It
1
Connect OBD-II scanner and read fault codes
2
Inspect oxygen sensor voltage readings at idle and 2000 RPM
3
Check fuel pressure with fuel pressure gauge
4
Perform visual inspection of vacuum hoses
5
Test mass air flow sensor output
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 gauge
Vacuum hose repair kit
Related Error Codes