Brand new EGR Valve, tried resetting by scanner and manuely
faulty EGR Valve, replaced EGR Valve and SES light is still on after resetting on 2001 Mitsubishi Galant
What is the exact code, then I can help you? It should start with a P and have 4 numbers after it, like P0133 etc, or an EGR code may be P0401 etc.
The code is P0403