P1405Manufacturer-specific code

P1405 Code: DPFE Sensor Inlet Hose Disconnected or Plugged (Ford)

On Ford, Lincoln and Mercury vehicles, the P1405 code means the inlet hose of the DPFE sensor is disconnected or plugged. It usually causes no noticeable symptoms beyond the check engine light. Other brands may define this number differently.

Severity
Low
Can I keep driving?
Yes, no immediate risk
Estimated cost
$10 to $150
Difficulty
Easy
System
Emissions Control
Applies to
Depends on the manufacturer

Common in: Ford

Updated Reviewed by Renzo Chacca

On this page

What the P1405 code means

P1405 is a manufacturer-specific code: the 1 in the second position means each automaker defines what it means, not the generic SAE standard. The most widespread definition is the one used by Ford, Lincoln and Mercury. If your vehicle is another brand, confirm the code text with a scan tool that supports that manufacturer.

ManufacturerMeaning of P1405
Ford, Lincoln and MercuryDPFE sensor inlet hose disconnected or plugged

Ford measures EGR flow with the DPFE sensor, which compares the pressure before and after a calibrated orifice in the EGR tube by means of two hoses.

The computer sets the P1405 code when the pressure in the inlet hose is not what it expects: the hose has come loose, cracked or filled up with carbon.

Before you start repairs, confirm the make, model, year and engine. With manufacturer codes, the same number can change even between engines from the same brand.

P1405 code symptoms

  • Check engine light on.
  • Usually no symptoms at all.

Likely causes of the P1405 code

  1. Inlet hose loose or cracked. Check for cracks and clamps, especially in the hot areas.
  2. Inlet hose plugged with carbon. Check for cracks and clamps, especially in the hot areas.
  3. Hoses swapped after a previous repair.
  4. DPFE sensor. Confirm it by comparing its reading with the real value.

How to diagnose the P1405 code step by step

  1. Inspect both hoses to make sure they are not swapped. The one on the exhaust side goes to the port marked as the high side.
  2. Blow through the hoses and the ports to confirm air passes freely.
  3. Measure the DPFE signal and compare it with the pressure the engine should be producing.

How to fix the P1405 code

  • Replace the hoses with heat-resistant ones.
  • Clean the ports on the EGR tube.
  • Replace the DPFE sensor if it fails.

Technical reference data

  • The DPFE hoses are heat-resistant rubber, not ordinary vacuum hose.
  • P1xxx codes are manufacturer-specific: confirm the definition with a scan tool that supports your brand.
  • Reference values: check the manufacturer data for your vehicle.

Brand-specific notes

This code shows up often on Ford vehicles, so it pays to look at the hoses before buying parts.

P1405 on Ford

Common on the Ford Taurus, Explorer, Ranger and F-150.

If your vehicle is another brand, check the table above for the meaning its manufacturer gives this code and confirm it with a compatible scan tool.

Frequently asked questions about P1405

What does the P1405 code mean on a Ford?
It means the inlet hose of the DPFE sensor is disconnected or plugged. It usually causes no symptoms other than the check engine light.
Does P1405 mean the same thing on every brand?
No. It is a manufacturer-specific code, so on other brands it may not exist or may mean something different. Confirm it with a scan tool that supports your make.
Can I drive with a P1405 code?
Yes. With a P1405 code, severity is low and the car normally drives as usual. Still, fix it so the EGR system can be monitored properly.
How much does it cost to fix P1405?
Roughly $10 to $150 on a Ford. A new hose costs very little, while a replacement DPFE sensor pushes the total toward the top of that range.
Will a P1405 code clear itself?
Not while the hose is still loose or plugged. Once the hose is repaired and the code is cleared, it should stay off.
What is the most common cause of P1405?
A loose, cracked or carbon-plugged inlet hose is the most common cause. Hoses that were swapped during an earlier repair are another frequent one.

Related codes

Questions about the P1405 code

There are no questions about this code yet. Tell us about your case: vehicle, symptoms and what you have already checked.