P1409moderate severityPowertrain
EGR Vacuum Regulator Solenoid Circuit Malfunction
on 2008 Ford F-150 4.2L V6 · 4WD
What this code means
The EGR Vacuum Regulator (EVR) solenoid circuit has a malfunction. This solenoid controls vacuum to the EGR valve. When it fails, EGR valve operation is impaired.
Symptoms
- Check Engine Light
- EGR valve stuck open or closed
- Rough idle (if stuck open)
- Knocking/pinging (if stuck closed)
- Failed emissions
Common causes
- Faulty EVR solenoid
- Wiring issue to EVR solenoid
- Clogged vacuum lines to EGR valve
- PCM driver failure
Diagnostic steps
- Test EVR solenoid resistance (typically 26-40 ohms)
- Check wiring and connector
- Inspect vacuum lines
- Command solenoid with scan tool and verify operation
Repair notes
Replace EVR solenoid if faulty. Repair vacuum lines. Check wiring.
Other Powertrain codes on this vehicle
P0001
Fuel Volume Regulator Control Circuit/Open
P0002
Fuel Volume Regulator Control Circuit Range/Performance
P0003
Fuel Volume Regulator Control Circuit Low
P0004
Fuel Volume Regulator Control Circuit High
P0010
Intake Camshaft Position Actuator Circuit/Open Bank 1
P0011
Intake Camshaft Position Timing Over-Advanced Bank 1
P0012
Intake Camshaft Position Timing Over-Retarded Bank 1
P0013
Exhaust Camshaft Position Actuator Circuit/Open Bank 1
P0014
Exhaust Camshaft Position Timing Over-Advanced Bank 1
P0015
Exhaust Camshaft Position Timing Over-Retarded Bank 1