p0401
Moderate
Renault · Sedans & Hatchbacks
EGR Flow Insufficient
Quick Answer
Error code P0401 on your Renault Sedans & Hatchbacks means: EGR Flow Insufficient. This is usually fixable — see the step-by-step guide below.
Affected Models
Applies to all models
Likely Causes
How to Fix It
1
Perform diagnostic scan
2
Check EGR valve operation
3
Inspect for vacuum leaks
4
Clean EGR valve
5
Replace EGR valve if needed
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
EGR valve (optional)
Vacuum hoses (optional)
Gasket sealer (optional)
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