P1406moderate severityPowertrain
DPFE Sensor Downstream Hose Off or Plugged
on 1997 Ford Explorer 5.0L V8 · AWD
What this code means
The DPFE sensor downstream hose is disconnected or plugged. This prevents the sensor from measuring exhaust pressure after the EGR orifice, making accurate EGR flow measurement impossible.
Symptoms
- Check Engine Light
- Poor EGR control
- Rough idle
- Failed emissions
- Stalling
Common causes
- Disconnected downstream DPFE hose
- Plugged downstream DPFE hose
- Cracked hose
- Carbon buildup in EGR passages
- Faulty DPFE sensor
Diagnostic steps
- Inspect downstream DPFE hose (hose closer to EGR valve)
- Check for blockage
- Replace deteriorated hose
- Clean EGR passages with EGR cleaner
- Test DPFE sensor
Repair notes
Reconnect or replace DPFE downstream hose. Clean EGR system. Replace DPFE sensor if needed.
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