Symptoms

- Engine Light ON (or Service Engine Soon Warning Light)

Possible Causes

- Harness or connectors - The EGRC-solenoid valve circuit is open or shorted - EGRC-solenoid valve

When Detected

Malfunction is detected when the improper voltage signal is sent to ECM through EGRC-solenoid valve.

Tech Notes

Check hoses connector at the EGR solenoid valve.

Description

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.