AutoCodes – Generic – P24C4

P24C4 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 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 12,240

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

What does this mean?

What are the Possible Causes of the DTC P24C4?

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?

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 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 code?

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

Need Help with the Code?

Get the P24C4 code diagnosed by a professional: Find a repair shop in your area

Information for Specific Makes

P24C4 Buick — Exhaust Gas Recirculation Cooler Bypass Position Sensor Exceeded Learning Limit
P24C4 Cadillac — Exhaust Gas Recirculation Cooler Bypass Position Sensor Exceeded Learning Limit
P24C4 Chevrolet — Exhaust Gas Recirculation Cooler Bypass Position Sensor Exceeded Learning Limit
P24C4 GMC — Exhaust Gas Recirculation Cooler Bypass Position Sensor Exceeded Learning Limit

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 Code

1. What are the common symptoms of OBDII code P24C4?

The common symptoms of OBDII code P24C4 include poor engine performance, reduced fuel efficiency, and illuminated Check Engine Light.

2. What does the OBDII code P24C4 indicate?

OBDII code P24C4 indicates that the Exhaust Gas Recirculation (EGR) cooler bypass position sensor has exceeded its learning limit.

3. What are the possible causes of OBDII code P24C4?

Possible causes of OBDII code P24C4 include a faulty EGR cooler bypass position sensor, wiring issues, software glitches, or a malfunctioning EGR system.

4. How serious is OBDII code P24C4?

OBDII code P24C4 should be addressed promptly to prevent potential damage to the EGR system and to ensure optimal engine performance.

5. Can I continue to drive my vehicle with OBDII code P24C4?

It is not recommended to drive your vehicle with OBDII code P24C4 unresolved, as it can lead to further engine issues and decreased fuel efficiency.

6. How can OBDII code P24C4 be diagnosed?

Diagnosing OBDII code P24C4 typically involves using a diagnostic scanner to retrieve the trouble codes, performing a visual inspection of the EGR system, and testing the EGR cooler bypass position sensor.

7. What are some repair tips for OBDII code P24C4?

Repair tips for OBDII code P24C4 may include inspecting and repairing any damaged wiring, replacing the faulty EGR cooler bypass position sensor, and resetting the EGR system's learned values.

8. Can OBDII code P24C4 be fixed without professional help?

While some basic troubleshooting steps can be taken by DIY enthusiasts, resolving OBDII code P24C4 may require professional diagnosis and repair to ensure the issue is properly addressed.

9. How much does it cost to repair OBDII code P24C4?

The cost of repairing OBDII code P24C4 can vary depending on the underlying cause, parts needed for replacement, and labor costs. It is recommended to obtain quotes from reputable mechanics or service centers.

10. How can I prevent OBDII code P24C4 from occurring again?

To prevent OBDII code P24C4 from occurring again, it is essential to perform regular maintenance on the EGR system, address any issues promptly, and follow the manufacturer's recommended service intervals.