AutoCodes – GMC – P24A5 GMC

P24A5 GMC Code - Exhaust Gas Recirculation Cooler Bypass Control Stuck Bank 1

Quick Answer

The Engine Control Module (ECM) uses the Exhaust Gas Recirculation (EGR) bypass valve position sensor to determine the position of the bypass valve. Common causes include Faulty Exhaust Gas Recirculation (EGR) Cooler Bypass Valve, Exhaust Gas Recirculation (EGR) Cooler Bypass Valve harness is open or shorted, Exhaust Gas Recirculation (EGR) Cooler Bypass Valve circuit poor electrical connection. 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: P24A5 GMC indicates Exhaust Gas Recirculation Cooler Bypass Control Stuck Bank 1.
Common causes: Common causes include Faulty Exhaust Gas Recirculation (EGR) Cooler Bypass Valve, Exhaust Gas Recirculation (EGR) Cooler Bypass Valve harness is open or shorted, Exhaust Gas Recirculation (EGR) Cooler Bypass Valve circuit poor electrical connection.
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 1,001

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 P24A5 GMC Description

The Engine Control Module (ECM) uses the Exhaust Gas Recirculation (EGR) bypass valve position sensor to determine the position of the bypass valve. The ECM sends a reference voltage through the 5-volt reference circuit to the position sensor. The ECM provides a voltage return path for the sensor through the low reference circuit. A variable voltage signal, based on the valve position, is sent from the sensor to the ECM through the position sensor signal circuit. The ECM compares the actual bypass
valve position with the desired bypass valve position when the valve is commanded open or closed. The EGR cooler bypass valve is controlled by the ECM through the bypass valve motor high control and the low control circuits. The ECM will pulse width modulate the low control circuit to ground when EGR cooler bypass is desired.

OBDII Code P24A5 GMC - Exhaust Gas Recirculation Cooler Bypass Control Stuck Bank 1 - AutoCodes.com — P24A5 GMC Code - Exhaust Gas Recirculation Cooler Bypass Control Stuck Bank 1

What does this mean?

What are the Possible Causes of the DTC P24A5 GMC?

Faulty Exhaust Gas Recirculation (EGR) Cooler Bypass Valve
Exhaust Gas Recirculation (EGR) Cooler Bypass Valve harness is open or shorted
Exhaust Gas Recirculation (EGR) Cooler Bypass Valve circuit poor electrical connection
Faulty Engine Control Module (ECM)

How to Fix the DTC P24A5 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 P24A5 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 P24A5 GMC Code

1. What are common symptoms of the OBDII code P24A5 GMC?

The common symptoms of the P24A5 code include reduced engine performance, decreased fuel efficiency, rough idling, and the illumination of the Check Engine Light.

2. What does the OBDII code P24A5 GMC indicate?

The P24A5 code indicates that the Exhaust Gas Recirculation (EGR) Cooler Bypass Control is stuck on Bank 1 in the vehicle's exhaust system.

3. What are possible causes of the P24A5 code?

Possible causes of the P24A5 code include a faulty EGR cooler bypass control valve, wiring or connection issues, a stuck EGR valve, or a malfunctioning EGR cooler.

4. How serious is the P24A5 GMC code?

While the P24A5 code may not cause immediate harm to your vehicle, it can lead to decreased engine efficiency and increased emissions if left unresolved. It is advisable to address this issue promptly.

5. How can I diagnose the P24A5 code?

Diagnosing the P24A5 code typically involves using an OBDII scanner to read the code and then conducting further inspection of the EGR system components to identify the specific cause of the issue.

6. How can I repair the P24A5 GMC code?

Repairing the P24A5 code may involve replacing the faulty EGR cooler bypass control valve, addressing any wiring or connection issues, cleaning or replacing a stuck EGR valve, or repairing/replacing the EGR cooler.

7. Can I drive my vehicle with the P24A5 code?

While you may be able to drive your vehicle with the P24A5 code present, it is recommended to address the issue as soon as possible to prevent potential long-term damage to the engine and to ensure optimal performance.

8. How much does it cost to fix the P24A5 GMC code?

The cost of fixing the P24A5 code can vary depending on the specific cause of the issue, the labor rates in your area, and whether any parts need to be replaced. It is advisable to consult with a mechanic for a more accurate estimate.

9. How often does the P24A5 code occur in GMC vehicles?

The P24A5 code related to the Exhaust Gas Recirculation Cooler Bypass Control Stuck Bank 1 can occur in various GMC vehicles equipped with EGR systems, particularly those with diesel engines.

10. Can the P24A5 GMC code be prevented?

While some causes of the P24A5 code may be difficult to prevent, regular maintenance of the EGR system, including cleaning and inspection, can help reduce the likelihood of this code occurring.