DPFE Sensor Upstream Hose Off or Plugged

What it means

This is a Ford, Lincoln and Mercury code; the same number can mean something different on other makes. The DPFE sensor has two hoses connecting it to the EGR tube before and after a metering orifice, and this code means the computer sees the upstream (exhaust-side) hose as disconnected or blocked. The fix is often simple, such as refitting or replacing the hose.

Models covered: Ford (and Lincoln/Mercury) models with a DPFE-type EGR system, mainly around 1996–2004.

Related codes: P1406P1400P0401P0402P1401

Symptoms3

• Check engine light on.
• Usually no change in driving.
• Light pinging under load in some cases if EGR control is affected.

Possible causes5

• Upstream hose disconnected from the sensor or the EGR tube.
• Hose cracked or melted by exhaust heat.
• Metal EGR tube port blocked with carbon.
• Hoses swapped after earlier service.
• Failed DPFE sensor.

How to diagnose4

1. Inspect both hoses and confirm each is on its correct port per the sensor markings and the manufacturer manual.
2. Check the hoses for cracks, melting or softness.
3. Remove the hose and confirm the metal tube port is open and not blocked with carbon.
4. Watch the DPFE reading on a scan tool at idle and when the EGR valve opens.

How to fix5

1. Refit the hose on its correct port.
2. Replace both hoses with heat-resistant hoses if they are cracked.
3. Clean the blocked EGR tube port.
4. Replace the DPFE sensor if its reading is still wrong.
5. Clear the code and confirm the EGR test passes.

Repair cost

In Saudi riyals; the highlighted part is the expected range for this fault.

A hose or a port cleaning is often enough at low cost; the cost rises if the DPFE sensor must be replaced.

Prices are rough estimates for common cars at independent workshops and vary with the car and the source of the part.
Prices last updated: September 2026

Frequently asked questions