AutoCodes – GMC – P24C4 GMC

P24C4 GMC Code - Exhaust Gas Recirculation Cooler Bypass Position Sensor Exceeded Learning Limit

Quick Answer

The offset of the Exhaust Gas Recirculation (EGR) cooler bypass valve is checked after the offset learning has been completed in the after-run/post drive. Common causes include Faulty Exhaust Gas Recirculation (EGR) Cooler Bypass Valve, Exhaust Gas Recirculation Cooler Bypass Valve harness is open or shorted, Exhaust Gas Recirculation Cooler Bypass Valve 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: P24C4 GMC indicates Exhaust Gas Recirculation Cooler Bypass Position Sensor Exceeded Learning Limit.
Common causes: Common causes include Faulty Exhaust Gas Recirculation (EGR) Cooler Bypass Valve, Exhaust Gas Recirculation Cooler Bypass Valve harness is open or shorted, Exhaust Gas Recirculation Cooler Bypass Valve 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 2,241

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 31, 2021

Description
Possible Causes
How To Fix
Cost to Diagnose
FAQs
Comments
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Code P24C4 GMC Description

The offset of the Exhaust Gas Recirculation (EGR) cooler bypass valve is checked after the offset learning has been completed in the after-run/post drive. The difference between the maximum and minimum EGR cooler bypass valve offset values is calculated by the Engine Control Module (ECM). If the difference is above a calibrated threshold or the offset learned value is not within a calibrated range, a fault is recognized. While the offset learning is active, the EGR cooler bypass valve is checked for a jammed valve. If the valve is stuck during opening or closing for a calibrated time, a fault is reported. If either of these conditions occurs, the Diagnostic Trouble Code (DTC) will be set.

OBDII Code P24C4 GMC - Exhaust Gas Recirculation Cooler Bypass Position Sensor Exceeded Learning Limit - AutoCodes.com — P24C4 GMC Code - Exhaust Gas Recirculation Cooler Bypass Position Sensor Exceeded Learning Limit

What does this mean?

What are the Possible Causes of the DTC P24C4 GMC?

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

How to Fix the DTC P24C4 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 P24C4 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.

Need more information about the P24C4 GMC code?

Need more information on how to fix the P24C4 GMC code? Get Access to Factory Service Manuals

Need Help with the Code?

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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 P24C4 GMC Code

1. What are the common symptoms of OBDII code P24C4 in a GMC vehicle?

Symptoms may include poor engine performance, reduced fuel efficiency, and the illumination of the check engine light.

2. What does the OBDII code P24C4 for GMC mean?

The code P24C4 indicates that the Exhaust Gas Recirculation (EGR) cooler bypass position sensor has exceeded its learning limit in a GMC vehicle.

3. What are the possible causes of OBDII code P24C4 in a GMC vehicle?

Common causes of this code include a faulty EGR cooler bypass position sensor, wiring issues, a malfunctioning EGR valve, or a problem with the engine control module (ECM).

4. How can I diagnose OBDII code P24C4 in my GMC?

Diagnosis typically involves using a scan tool to read the code, inspecting the EGR cooler bypass position sensor and its wiring for damage, and testing the EGR system components for proper functionality.

5. Can I continue driving my GMC with OBDII code P24C4?

It is not recommended to drive your vehicle for an extended period with this code as it can lead to further engine damage and potentially worsen fuel economy.

6. How can I repair OBDII code P24C4 in my GMC?

Repair options may include replacing the faulty EGR cooler bypass position sensor, repairing any damaged wiring, cleaning or replacing the EGR valve, or resetting the ECM to clear the learning limit.

7. Will resetting the ECM clear OBDII code P24C4 in my GMC?

Resetting the ECM may temporarily clear the code, but if the underlying issue is not addressed, the code is likely to return after driving the vehicle for some time.

8. Is it safe to ignore OBDII code P24C4 in my GMC?

Ignoring this code can lead to decreased engine performance, reduced fuel efficiency, and potential damage to other engine components, so it is not recommended to ignore it.

9. How much does it typically cost to repair OBDII code P24C4 in a GMC?

The cost of repairs can vary depending on the specific issue causing the code, but it may range from $100 to $500 or more, including parts and labor.

10. Can a DIY enthusiast repair OBDII code P24C4 in a GMC?

While some experienced DIY enthusiasts may be able to diagnose and repair this code themselves, it is recommended to consult a professional mechanic for accurate diagnosis and proper repair to avoid further complications.