P0402Medium Priority
Exhaust Gas Recirculation Flow Excessive Detected
Category: Powertrain• Auxiliary Emission Controls
5 articles · 3 makes affected
What is P0402?
Exhaust Gas Recirculation (EGR) Flow Excessive. Too much exhaust gas is being recirculated, affecting engine performance.
Symptoms You May Notice
- ●Check engine light
- ●Rough idle
- ●Poor acceleration
- ●Engine stalling
- ●Black smoke
How to Fix It
- ●Replace EGR valve ($200-$500, intermediate)
- ●Clean EGR passages ($150-$400, intermediate)
- ●Replace DPFE sensor ($100-$300, intermediate)
Owner Statistics
Based on 71,882 real owner discussions • 1820 confirmed solutions
$3,656
Average Repair Cost
3%
Success Rate
25%
DIY Repairs
71,882
Data Sources
About This Data
Statistics are aggregated from real owner discussions on Reddit, automotive forums, and YouTube comments. All data is anonymized and represents actual repair experiences reported by vehicle owners.
Frequently Appears With
These codes often appear together in owner reports. Check these if you see P0402.
Based on analysis of 10 owner reports where multiple codes appeared together.