AutoCodes – Ford – P2456 Ford

P2456 Ford Code - Diesel Particulate Filter Pressure Sensor 'A' Circuit Intermittent/Erratic

Quick Answer

The Powertrain Control Module (PCM) monitors the rationality of the Diesel Particulate Filter (DPF) pressure sensor during idle and part load operating conditions. Common causes include Faulty Diesel Particulate Filter (DPF) Pressure Sensor, Diesel Particulate Filter (DPF) Pressure Sensor harness is open or shorted, Diesel Particulate Filter (DPF) Pressure Sensor circuit poor electrical connection. Severity is High - diagnose this code as soon as possible. Driving is not recommended if the warning light is flashing, the engine runs poorly, or safety-related symptoms are present.

What it means: P2456 Ford indicates Diesel Particulate Filter Pressure Sensor 'A' Circuit Intermittent/Erratic.
Common causes: Common causes include Faulty Diesel Particulate Filter (DPF) Pressure Sensor, Diesel Particulate Filter (DPF) Pressure Sensor harness is open or shorted, Diesel Particulate Filter (DPF) Pressure Sensor circuit poor electrical connection.
Severity: High - diagnose this code as soon as possible.
Can I drive?: Driving is not recommended if the warning light is flashing, the engine runs poorly, or safety-related symptoms are present.

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Code Popularity 22,029

How popular is this code, among other codes? Low

Repair Importance Level

Urgent (Diagnose now) (3 / 3)

Repair Difficulty Level

Advanced (Pro) (3 / 3)

What is this?

Table of contents Created and updated by William Orellana on Jan 14, 2019

Description
Possible Causes
How To Fix
Cost to Diagnose
Comments
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Code P2456 Ford Description

The Powertrain Control Module (PCM) monitors the rationality of the Diesel Particulate Filter (DPF) pressure sensor during idle and part load operating conditions. The test fails when the diesel particulate filter pressure sensor signal value at idle is less than 0.15 kPa (0.022 psi). The test also fails when the diesel particulate filter pressure sensor signal value at part load is less than a minimum value or greater than a maximum value. These minimum and maximum values are based on the volume of exhaust.

OBDII Code P2456 Ford - Diesel Particulate Filter Pressure Sensor 'A' Circuit Intermittent/Erratic - AutoCodes.com — P2456 Ford Code - Diesel Particulate Filter Pressure Sensor 'A' Circuit Intermittent/Erratic

What does this mean?

What are the Possible Causes of the DTC P2456 Ford?

Faulty Diesel Particulate Filter (DPF) Pressure Sensor
Diesel Particulate Filter (DPF) Pressure Sensor harness is open or shorted
Diesel Particulate Filter (DPF) Pressure Sensor circuit poor electrical connection
Diesel particulate filter pressure sensor connecting hose is loose, cracked, or missing
Diesel particulate filter pressure sensor connecting hose port is cracked or broken
Excessive amount of soot or ash in the diesel particulate filter

How to Fix the DTC P2456 Ford?

Review the 'Possible Causes' above and visually examine the corresponding wiring harness and connectors. Check for damaged components and inspect connector pins for signs of being broken, bent, pushed out, or corroded.

What is the Cost to Diagnose the Code?

Labor: 1.0

To diagnose the P2456 Ford code, it typically requires 1.0 hour of labor. Rates vary by location, vehicle, and shop. Many shops charge between $80–$150 per hour; dealerships and metro areas may be higher, independents may be lower.

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About the author: William Orellana is a Master Mechanic and Mechanical Engineer with over 30 years of experience diagnosing and repairing vehicles. Learn more about his background.