Engine Error
P0404
Exhaust Gas Recirculation Circuit Range/Performance
Severity
Medium
Symptoms
Rough idle, hesitation, decrease in fuel economy
Common Causes
- Carbon buildup restricting EGR valve movement
- Faulty EGR position sensor
- Defective EGR valve
- Vacuum line leak
How to Fix
- 1 Remove and clean the EGR valve
- 2 Replace the EGR valve assembly
- 3 Check and replace vacuum hoses
- 4 Verify EGR sensor voltage
Estimated Repair Cost
USD
$50
–
$350
Cleaning: $50 - $100; EGR Valve replacement: $200 - $350