p0171
Moderate
Renault · Sedans & Hatchbacks
System Too Lean (Bank 1)
Quick Answer
Error code P0171 on your Renault Sedans & Hatchbacks 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
Scan vehicle with diagnostic tool
2
Check oxygen sensor readings
3
Inspect for vacuum leaks
4
Test fuel pressure
5
Replace faulty component
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 (optional)
Vacuum hoses (optional)
Fuel filter (optional)
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