P026A GMC Code - Charge Air Cooler Low Efficiency
Quick Answer
The Engine Control Module (ECM) monitors the ambient air temperature, and the charge air temperature before and after the Charge Air Cooler to calculate the efficiency of the Charge Air Cooler (CAC). Common causes include Faulty Charge Air Cooler, Charge Air Cooler harness is open or shorted, Charge Air Cooler 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
- P026A GMC indicates Charge Air Cooler Low Efficiency.
- Common causes
- Common causes include Faulty Charge Air Cooler, Charge Air Cooler harness is open or shorted, Charge Air Cooler 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.
Code P026A GMC Description
The Charge Air Cooler inlet temperature sensor, located at the turbocharger outlet, and the Charge Air Cooler outlet temperature sensor, located near the intake air flow valve are variable resistors. The ECM supplies 5 V to the signal circuit and a ground for the sensors' low reference circuits.
What are the Possible Causes of the DTC P026A GMC?
- Faulty Charge Air Cooler
- Charge Air Cooler harness is open or shorted
- Charge Air Cooler circuit poor electrical connection
- Faulty Engine Control Module (ECM)
How to Fix the DTC P026A 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 P026A 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 P026A GMC code?
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Need Help with the Code?
Get the P026A GMC code diagnosed by a professional: Find a repair shop in your area
Information for Specific GMC Models
- P026A 2014 GMC Sierra — Charge Air Cooler Low Efficiency
- P026A 2015 GMC Sierra — Charge Air Cooler Low Efficiency
- P026A 2016 GMC Sierra — Charge Air Cooler Low Efficiency
- P026A 2017 GMC Sierra — Charge Air Cooler Low Efficiency
- P026A 2018 GMC Sierra — Charge Air Cooler Low Efficiency
Frequently Asked Questions about P026A GMC Code
1. What are the common symptoms of OBDII code P026A GMC (Charge Air Cooler Low Efficiency)?
- Common symptoms include reduced engine power, poor acceleration, and potential engine stalling.
2. What are some possible causes of the OBDII code P026A GMC?
- The code P026A can be triggered by issues such as a faulty charge air cooler, leaks in the charge air system, or a malfunctioning boost pressure sensor.
3. How can I diagnose the cause of the OBDII code P026A GMC?
- Diagnosing the code may involve visually inspecting the charge air cooler for damage, checking for leaks in the charge air system, and testing the boost pressure sensor.
4. Can a dirty air filter trigger the OBDII code P026A GMC?
- Yes, a dirty air filter can restrict airflow to the engine, leading to reduced efficiency of the charge air cooler and potentially triggering the code P026A.
5. What are some repair tips for addressing the OBDII code P026A GMC?
- Repair tips may include cleaning or replacing the charge air cooler, repairing any leaks in the charge air system, replacing the boost pressure sensor, and ensuring proper airflow by maintaining a clean air filter.
6. Is it safe to continue driving with the OBDII code P026A GMC active?
- It is not recommended to continue driving with the code active, as it can lead to further engine problems and potential damage if left unresolved.
7. Can weather conditions affect the performance of the charge air cooler and trigger the OBDII code P026A GMC?
- Extreme weather conditions, such as high temperatures, can impact the efficiency of the charge air cooler and potentially contribute to triggering the code P026A.
8. How can regular maintenance help prevent the OBDII code P026A GMC from occurring?
- Regular maintenance, such as changing the air filter at recommended intervals, inspecting the charge air system for leaks, and ensuring proper cooling system function, can help prevent issues leading to the code P026A.
9. Are there any software updates or recalls related to the OBDII code P026A GMC?
- Check with your GMC dealership or manufacturer for any software updates or recalls related to the code P026A, as there may be specific fixes or solutions available.
10. Can a DIY enthusiast address the OBDII code P026A GMC, or is professional help recommended?
- While some basic checks and maintenance tasks can be performed by a DIY enthusiast, addressing the code P026A may require specialized tools and expertise, so professional help is often recommended for accurate diagnosis and repair.
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