will a egr valve fix a p1400 code

NO YOU HAVE A FLOW ISSUE IN THE EVAP SYSTEM I REC YOU HAVE IT CK'D BY YOUR MECH BECAUSE THESE ISSUES ARE VERY HARD TO DIAG AT TIMES

Tests/Procedures: 1. Test the Delta Pressure Feedback EGR (DPFE) sensor first, as it a very common failure item. 2. To test the DPFE sensor, monitor the voltage on the scan data or by back-probing the Brown/Light Green (BR/LG) wire at the sensor. 3. With the DPFE sensor disconnected and the key on, the voltage should be 5 volts. With the sensor plugged in and the key on, the voltage should be between 0.4 - 1.3 volts. If the unplugged reading is OK, but the plugged in reading is outside of this range, check the Brown/White (BR/W) wire at the sensor for 5 volt reference voltage and check the Gray/Red (GY/R) wire for a good ground. If OK, replace the DPFE sensor. 4. If the key on engine off reading is within range, gradually apply 8 inches of vacuum to the port on the DPFE sensor that is marked "REF". As vacuum is applied, the voltage should rise and at 8 inches of vacuum, it should be over 4 volts. The sensor should also hold vacuum. If it fails to go over 4 volts or does not hold vacuum, replace the DPFE sensor. Possible causes •DPFEGR sensor connector is damaged (check pins for damage, and moisture) •DPFEGR sensor signal circuit is shorted to ground •DPFEGR signal reference (5v) circuit is open or shorted to ground •DPFEGR sensor has failed •PCM has failed Key on or engine running; and the PCM detected the DPF EGR sensor signal was less than the minimum calibrated value of 0.20v. Note that the DPF EGR PID will read less than 0.20v with this code is set. This code sets in 2 Trip(s). This code will turn on the MIL (Malfunction Indicator Lamp