P1405moderate severityPowertrain
DPFE Sensor Upstream Hose Off or Plugged
on 2018 Lincoln MKX 2.7L V6 EcoBoost · AWD
What this code means
The DPFE sensor upstream hose is disconnected or plugged. This prevents the sensor from accurately measuring exhaust backpressure before the EGR orifice.
Symptoms
- Check Engine Light
- Poor EGR flow control
- Rough idle
- Failed emissions
- Reduced power
Common causes
- Disconnected upstream DPFE hose
- Plugged upstream DPFE hose (carbon buildup)
- Cracked hose
- Faulty DPFE sensor
Diagnostic steps
- Visually inspect upstream DPFE hose (hose closer to exhaust manifold)
- Check for carbon blockage in hose
- Blow through hose to verify flow
- Replace hose if cracked or deteriorated
- Test DPFE sensor if hoses are OK
Repair notes
Reconnect or replace DPFE upstream hose. Clean carbon from hose. Replace DPFE sensor if hoses are good.
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