P1409
EGR Vacuum Regulator Solenoid Circuit Malfunction
Severity
⚠️ MediumCan you drive?
Yes, but get it checked soon
Approx. repair cost
$17–78 (est.)
Symptoms
- Check Engine Light Is On
- Increased fuel consumption
- Rough engine idling
- Reduced engine power
Causes
- Open or short circuit of the EGR solenoid valve
- Malfunction of the vacuum regulator solenoid valve itself
- Poor contact in circuit connectors
- Problems with the control signal from the ECU
- Leaks in the vacuum lines of the EGR system
How to Fix
- Check the continuity of the solenoid valve circuit
- Check the resistance and operation of the solenoid valve
- Clean or replace circuit connectors
- Check vacuum lines for leaks
- Diagnose the engine control unit if necessary