2001 Spyder GT
Don't replace the EGR valve yet. The P0403 code is set by the EGR solenoid or it's wiring, not the valve. So start with the solenoid. You should measure 29 − 35Ω resistance across the solenoid's two electrical terminals. Check for signal to the solenoid by turning the ignition ON and measuring voltage between the disconnected harness pin 2 and ground. You should see battery voltage on your meter.Now I am troubleshooting a P0403 and P0442 code.I erased the codes but they came back the same thing so I may have to get a new EGR Valve .