P1400 EGR/EVAP Control Solenoid Circuit
That code didn't tell you any specific part was bad. Only that there was an issue in the circuit. The circuit needs to be further troubleshooted to find the actual issue.
The EGRC-solenoid valve responds to signals from the ECM. When the ECM sends an ON (ground) signal, the coil in the solenoid valve is energized. A plunger will then move to cut the vacuum signal (from the throttle body to the EGR valve.)
When the ECM sends an OFF signal, the vacuum signal passes through the solenoid valve. The signal then reaches the EGR valve.
Please consider a to help us answer more questions.
Friday, October 26th, 2012 AT 5:10 PM