AutoCodes – Buick – P244A Buick

P244A Buick Code - Diesel Particulate Filter Low Differential Pressure

Quick Answer

The exhaust differential pressure sensor measures the pressure difference across the inlet and outlet of the diesel particulate filter. Common causes include Faulty Diesel Particulate Filter (DPF), Faulty Diesel Particulate Filter Exhaust Differential Pressure Sensor, Diesel Particulate Filter Exhaust Differential Pressure Sensor harness is open or shorted. 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: P244A Buick indicates Diesel Particulate Filter Low Differential Pressure.
Common causes: Common causes include Faulty Diesel Particulate Filter (DPF), Faulty Diesel Particulate Filter Exhaust Differential Pressure Sensor, Diesel Particulate Filter Exhaust Differential Pressure Sensor harness is open or shorted.
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 604

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 Jul 28, 2021

Description
Possible Causes
How To Fix
Cost to Diagnose
FAQs
Comments
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Code P244A Buick Description

The exhaust differential pressure sensor measures the pressure difference across the inlet and outlet of the diesel particulate filter. The pressure difference across the diesel particulate filter increases as captured particulates in the diesel particulate filter increase. The Engine Control Module (ECM) supplies a 5 V reference circuit and a ground on the low reference circuit. The exhaust differential pressure sensor provides a signal voltage to the ECM, relative to the backpressure as a function of exhaust flow, diesel particulate filter temperature, and diesel particulate filter soot loading. The ECM converts the signal voltage input to a pressure value. The Diagnostic Trouble Code (DTC) will be set when the ECM detects the diesel particulate filter exhaust differential pressure sensor is lower than the minimum threshold.

OBDII Code P244A Buick - Diesel Particulate Filter Low Differential Pressure - AutoCodes.com — P244A Buick Code - Diesel Particulate Filter Low Differential Pressure

What does this mean?

What are the Possible Causes of the DTC P244A Buick?

Faulty Diesel Particulate Filter (DPF)
Faulty Diesel Particulate Filter Exhaust Differential Pressure Sensor
Diesel Particulate Filter Exhaust Differential Pressure Sensor harness is open or shorted
Diesel Particulate Filter Exhaust Differential Pressure Sensor circuit poor electrical connection

How to Fix the DTC P244A Buick?

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 P244A Buick 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.

Frequently Asked Questions about P244A Buick Code

1. What are common symptoms of the P244A OBDII code in a Buick related to the Diesel Particulate Filter Low Differential Pressure?

The common symptoms include reduced engine power, increased fuel consumption, and the illumination of the Check Engine Light.

2. What are the possible causes of the P244A code in a Buick indicating Diesel Particulate Filter Low Differential Pressure?

Possible causes may include a clogged diesel particulate filter, faulty differential pressure sensor, exhaust leaks, or issues with the diesel particulate filter pressure sensor.

3. How can I diagnose the P244A code in my Buick related to the Diesel Particulate Filter Low Differential Pressure?

Diagnosis typically involves using an OBDII scanner to retrieve the code, inspecting the diesel particulate filter and its components, checking for leaks in the exhaust system, and testing the differential pressure sensor.

4. Can driving with the P244A OBDII code in a Buick indicating Diesel Particulate Filter Low Differential Pressure cause further damage?

Continuing to drive with this code may lead to increased emissions, reduced fuel efficiency, and potential damage to the engine or emissions system over time.

5. Are there any temporary solutions or quick fixes for the P244A code related to the Diesel Particulate Filter Low Differential Pressure in a Buick?

It is not recommended to attempt temporary solutions or quick fixes for this code as it can indicate a serious issue with the diesel particulate filter system that requires proper diagnosis and repair.

6. How much does it typically cost to repair the P244A code in a Buick due to Diesel Particulate Filter Low Differential Pressure?

The cost of repairing this code can vary depending on the specific issue, but it may range from a couple of hundred to over a thousand dollars, including parts and labor.

7. Can I continue driving my Buick with the Check Engine Light on due to the P244A code for Diesel Particulate Filter Low Differential Pressure?

It is not recommended to drive your vehicle with the Check Engine Light on due to this code, as it can lead to further damage and potential safety hazards.

8. How long does it take to repair the P244A OBDII code in a Buick related to Diesel Particulate Filter Low Differential Pressure?

The repair time can vary depending on the exact issue causing the code, but it may take several hours to a full day for diagnosis and repair.

9. Is the P244A OBDII code indicating Diesel Particulate Filter Low Differential Pressure a common issue in Buick vehicles?

While it may not be as common as some other OBDII codes, issues related to the diesel particulate filter system can occur in Buick vehicles, especially in diesel engine models.

10. Can regular maintenance help prevent the occurrence of the P244A code related to Diesel Particulate Filter Low Differential Pressure in my Buick?

Regular maintenance, such as following the manufacturer's recommended service schedule and using high-quality diesel fuel, can help prevent issues with the diesel particulate filter system that may trigger this code.