What is code p1400 on a 96 nissan maxima?
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. The vacuum signal (from the intake manifold collector) passes through the solenoid valve. The signal then reaches the EGR valve. When the ECM sends an OFF signal, a plunger will then move to cut the vacuum signal.
When is the code detected? Malfunction is detected when the improper voltage signal is sent to ECM through EGRC-solenoid valve.
Possible Causes - Harness or connectors - The EGRC-solenoid valve circuit is open or shorted - EGRC-solenoid valve
Check vacuum hoses and connector at the EGR solenoid valve. If ok, test the solenoid:
EGR Control Solenoid Valve
See Figures 5 and 6
Fig. Fig. 5: EGRC control solenoid valve
Fig. Fig. 6: Checking the EGR control solenoid valve by applying voltage. Be sure to apply voltage as shown
The EGR and canister control solenoid valve is located on the intake manifold.
Automotive Repair Shop Manager, Technician/JA Mentor