P0404moderate severityPowertrain
EGR Control Circuit Range/Performance
on 2012 Lincoln MKX 3.7L V6 · AWD
What this code means
The EGR valve is not responding as commanded by the PCM.
Symptoms
- Check Engine Light
- Rough idle
- Stalling
- Poor performance
Common causes
- Carbon restricting EGR valve movement
- Faulty position sensor in EGR
- EGR valve mechanically stuck
Diagnostic steps
- Command EGR open/closed with scan tool and monitor position
- Check for carbon restricting movement
- Test position sensor
Repair notes
Clean or replace EGR valve.
Other Powertrain codes on this vehicle
P0001
Fuel Volume Regulator Control Circuit/Open
P0001
Fuel Volume Regulator Control Circuit/Open
P0002
Fuel Volume Regulator Control Circuit Range/Performance
P0002
Fuel Volume Regulator Control Circuit Range/Performance
P0003
Fuel Volume Regulator Control Circuit Low
P0003
Fuel Volume Regulator Control Circuit Low
P0004
Fuel Volume Regulator Control Circuit High
P0004
Fuel Volume Regulator Control Circuit High
P0010
Intake Camshaft Position Actuator Circuit/Open Bank 1
P0010
Intake Camshaft Position Actuator Circuit/Open Bank 1