What does P1401 mean on a Ford?

P1401. Differential Pressure Feedback EGR Sensor Circuit High Voltage. Applies to F-150, Ranger, Explorer, Taurus, Focus with DPFE-based EGR.

What causes P1401 on a Ford?

Failed DPFE sensor. Heat and moisture kill these regularly on Ford trucks Shorted DPFE signal wire to reference voltage Clogged or melted EGR pressure hoses to the sensor Corroded DPFE connector terminals PCM reference voltage fault

How do I fix P1401 on a Ford?

Inspect the DPFE sensor for heat damage and the hoses for melting or blockage Read DPFE voltage KOEO. A stuck-high reading points at the sensor or circuit Check signal, reference and ground at the sensor connector Clear the hoses or replace them if restricted Replace the DPFE sensor with an updated Motorcraft part when the circuit tests good

Code

P1401

Differential Pressure Feedback EGR Sensor Circuit High Voltage

Category: Powertrain - Auxiliary Emissions Controls
Severity: Check Engine Light
Applies to: F-150, Ranger, Explorer, Taurus, Focus with DPFE-based EGR
Related: P0406 Exhaust Gas Recirculation Sensor A Circuit High Input on OBD Codes List

Findings, check these first

Failed DPFE sensor. Heat and moisture kill these regularly on Ford trucks
Shorted DPFE signal wire to reference voltage
Clogged or melted EGR pressure hoses to the sensor
Corroded DPFE connector terminals
PCM reference voltage fault

Standard procedure

Inspect the DPFE sensor for heat damage and the hoses for melting or blockage
Read DPFE voltage KOEO. A stuck-high reading points at the sensor or circuit
Check signal, reference and ground at the sensor connector
Clear the hoses or replace them if restricted
Replace the DPFE sensor with an updated Motorcraft part when the circuit tests good

Code lookup

Type a code above, or start from a symptom or a common code.

Press / to jump to the box. Ford-enhanced powertrain, body, chassis and network codes. Generic P0xxx codes live on OBD Codes List.

Sources and review

Review: checked against the recorded source material.

OBDII.pro: P1401 Ford definition
live reference page (obdii.pro)
Supports: Ford-family meaning for P1401: DPFE Circuit High Input
Fetched directly. obdii.pro is a publisher independent of the engine-codes family.
P1401 FORD Code: Meaning, Causes, and Symptoms | OBD2 Codes
live reference page (obd2-codes.co)
Supports: Ford meaning for P1401: DPFE Sensor Circuit High
Fetched directly. obd2-codes.co phrasing matches the engine-codes family, so it counts as one publisher.

Last updated 2026-09-20.

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