P026A 2014 GMC Sierra 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 2014 GMC Sierra 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 2014 GMC Sierra 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 2014 GMC Sierra?
- 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 2014 GMC Sierra?
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 2014 GMC Sierra 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 2014 GMC Sierra code?
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Frequently Asked Questions about P026A 2014 GMC Sierra Code
1. What does the OBDII code P026A mean on a 2014 GMC Sierra?
P026A indicates "Charge Air Cooler Efficiency Below Threshold," meaning the engine's ECM has detected insufficient cooling performance from the charge air cooler (intercooler).
2. What are the common symptoms of code P026A on a 2014 GMC Sierra?
Symptoms may include reduced engine performance, poor fuel economy, increased intake air temperatures, possible black smoke from the exhaust, and the Check Engine Light illuminating.
3. What causes the P026A code on a 2014 GMC Sierra?
Common causes include a clogged or damaged intercooler, boost leaks in the intake system, a malfunctioning intake air temperature sensor, or restricted airflow due to debris.
4. Can driving with a P026A code damage my 2014 GMC Sierra?
Yes, prolonged driving with this code can lead to engine overheating, reduced power, and potential damage to the engine or turbocharger due to excessive intake air temperatures.
5. How can I diagnose the P026A code on my 2014 GMC Sierra?
Start by inspecting the charge air cooler for damage or blockages, check for boost leaks in the intake system, and test the intake air temperature sensor for proper operation.
6. What tools are needed to diagnose and fix the P026A code?
You'll need an OBDII scanner, a boost leak tester, a temperature sensor tester, and potentially basic hand tools to inspect and repair the charge air cooler or intake system.
7. How do I fix the P026A code on a 2014 GMC Sierra?
Depending on the cause, fixes may include cleaning or replacing the charge air cooler, repairing leaks in the intake system, replacing a faulty intake air temperature sensor, or clearing debris obstructing airflow.
8. Is the P026A code related to the turbocharger on my 2014 GMC Sierra?
Yes, this code can be indirectly related to the turbocharger since the charge air cooler works with the turbo to cool compressed air. Issues with the turbo system, like leaks, can trigger this code.
9. Can a dirty air filter cause the P026A code?
While not a direct cause, a dirty air filter can restrict airflow, potentially contributing to reduced charge air cooler performance and triggering the P026A code.
10. How much does it cost to repair a P026A code on a 2014 GMC Sierra?
Repair costs vary depending on the issue. Cleaning the charge air cooler or fixing minor leaks can cost $100–$300, while replacing the cooler or sensors may cost $500–$1,000 or more.
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