AutoCodes – GMC – P24A0 GMC

P24A0 GMC Code - Closed Loop Diesel Particulate Filter Regeneration Control At Limit Low Temperature

Quick Answer

The diesel exhaust aftertreatment system consists of an underhood pre-catalytic converter and an underbody catalyst converter. Common causes include Perform the Diesel Particulate Filter Service Regeneration, Faulty Exhaust Gas Temperature Sensor, Exhaust Gas Temperature Sensor harness is open or shorted. Severity is Moderate - service should be scheduled soon. The vehicle may still be drivable for short trips if it runs normally, but avoid hard driving and repair it soon.

What it means: P24A0 GMC indicates Closed Loop Diesel Particulate Filter Regeneration Control At Limit Low Temperature.
Common causes: Common causes include Perform the Diesel Particulate Filter Service Regeneration, Faulty Exhaust Gas Temperature Sensor, Exhaust Gas Temperature Sensor harness is open or shorted.
Severity: Moderate - service should be scheduled soon.
Can I drive?: The vehicle may still be drivable for short trips if it runs normally, but avoid hard driving and repair it soon.

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Code Popularity 2,226

How popular is this code, among other codes? Low

Repair Importance Level

Moderate (Service soon) (2 / 3)

Repair Difficulty Level

Intermediate (2 / 3)

What is this?

Table of contents Created and updated by William Orellana on Jul 29, 2021

Description
Possible Causes
How To Fix
Cost to Diagnose
FAQs
Comments
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Code P24A0 GMC Description

The diesel exhaust aftertreatment system consists of an underhood pre-catalytic converter and an underbody catalyst converter. The underbody catalyst converter also consists of the main Diesel Oxidation Catalyst and the coated Diesel Particulate Filter (DPF). One of the main purposes of the DPF is to collect particulates from the engine exhaust in order to minimize discharge of soot to the atmosphere. The soot particles accumulate in the channels of the DPF and are burned off at regular intervals through a process called regeneration. This prevents the DPF from clogging. The Engine Control Module (ECM) commands the DPF regeneration after calculating various vehicle conditions such as DPF pressure difference, exhaust gas temperature, engine oil quality, engine speed, etc. Excessive accumulation of the soot in the DPF can cause a drop in the engine performance. During regeneration, additional fuel is injected via multiple post injections in order to increase the exhaust gas temperature. During this period, the DPF temperature is raised to approximately 600°C (1112°F) and the accumulated soot is oxidized or burned off into carbon dioxide (CO2). The Diagnostic Trouble Code (DTC) will be set when the ECM detects insufficient exhaust temperature upstream of the DPF during a DPF regeneration.

OBDII Code P24A0 GMC - Closed Loop Diesel Particulate Filter Regeneration Control At Limit Low Temperature - AutoCodes.com — P24A0 GMC Code - Closed Loop Diesel Particulate Filter Regeneration Control At Limit Low Temperature

What does this mean?

What are the Possible Causes of the DTC P24A0 GMC?

Perform the Diesel Particulate Filter Service Regeneration
Faulty Exhaust Gas Temperature Sensor
Exhaust Gas Temperature Sensor harness is open or shorted
Exhaust Gas Temperature Sensor circuit poor electrical connection
Faulty Exhaust Particulate Filter

How to Fix the DTC P24A0 GMC?

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 P24A0 GMC 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 P24A0 GMC Code

1. What are the common symptoms of OBDII code P24A0 GMC?

The common symptoms of code P24A0 include reduced engine performance, decreased fuel efficiency, and the illumination of the check engine light.

2. What does the OBDII code P24A0 GMC indicate?

OBDII code P24A0 indicates an issue with the Closed Loop Diesel Particulate Filter Regeneration Control At Limit Low Temperature in a GMC vehicle.

3. What are the possible causes of OBDII code P24A0 GMC?

Possible causes of code P24A0 include a faulty diesel particulate filter, a malfunctioning temperature sensor, issues with the regeneration control system, or a problem with the engine's cooling system.

4. How can I diagnose the OBDII code P24A0 GMC?

Diagnosing code P24A0 requires a professional diagnostic scan tool to read the code and investigate the underlying issue with the diesel particulate filter regeneration system.

5. Can I continue driving with OBDII code P24A0 GMC triggered?

It is not recommended to continue driving with code P24A0 active, as it can lead to further damage to the engine and emission control system.

6. How can I repair OBDII code P24A0 GMC?

Repairing code P24A0 may involve replacing the diesel particulate filter, repairing or replacing the temperature sensor, troubleshooting the regeneration control system, or addressing any cooling system issues.

7. Is OBDII code P24A0 GMC a serious issue?

Yes, code P24A0 GMC should be addressed promptly to ensure the proper functioning of the diesel particulate filter regeneration system and overall vehicle performance.

8. Can I reset OBDII code P24A0 GMC without fixing the underlying issue?

Resetting the code without addressing the underlying issue may temporarily turn off the check engine light, but the problem will likely reoccur and could lead to more severe issues in the future.

9. How much does it cost to fix OBDII code P24A0 GMC?

The cost of fixing code P24A0 GMC can vary depending on the exact cause of the issue, but it may range from a few hundred to a few thousand dollars, depending on the required repairs.

10. How often does OBDII code P24A0 GMC occur in GMC vehicles?

Code P24A0 GMC is a relatively uncommon OBDII code, but it can occur in GMC vehicles with diesel engines and particulate filter regeneration systems.