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P14A0 2018 GMC Sierra Code - Charge Air Cooler Coolant Pump Status Signal Message Counter Incorrect

Quick Answer

The P14A0 diagnostic trouble code for a 2018 GMC Sierra indicates that the Charge Air Cooler Coolant Pump Status Signal Message Counter is incorrect. Common causes include Faulty charge air cooler coolant pump, Wiring or connector issues, Malfunctioning control module. 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
P14A0 2018 GMC Sierra indicates Charge Air Cooler Coolant Pump Status Signal Message Counter Incorrect.
Common causes
Common causes include Faulty charge air cooler coolant pump, Wiring or connector issues, Malfunctioning control module.
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.
What is this?
Table of contents Created and updated by William Orellana on Sep 17, 2024
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Code P14A0 2018 GMC Sierra Description

The P14A0 diagnostic trouble code for a 2018 GMC Sierra indicates that the Charge Air Cooler Coolant Pump Status Signal Message Counter is incorrect. This code is related to the charge air cooler system, which is responsible for cooling the air that enters the engine to improve performance and efficiency. The charge air cooler coolant pump is a crucial component of this system, as it circulates coolant to regulate the temperature of the air before it enters the engine.

OBDII Code P14A0 2018 GMC Sierra - Charge Air Cooler Coolant Pump Status Signal Message Counter Incorrect
P14A0 2018 GMC Sierra Code - Charge Air Cooler Coolant Pump Status Signal Message Counter Incorrect

Common Causes of P14A0 2018 GMC Sierra

  1. Faulty charge air cooler coolant pump
  2. Wiring or connector issues
  3. Malfunctioning control module
  4. Low coolant levels in the system
  5. Electrical problems in the system

Symptoms of P14A0 2018 GMC Sierra

  1. Reduced engine power
  2. Decreased fuel efficiency
  3. Illuminated check engine light
  4. Engine overheating
  5. Rough idling or stalling

How to Fix P14A0 2018 GMC Sierra

  1. Begin by conducting a visual inspection of the charge air cooler coolant pump, wiring, and connectors to check for any visible damage or loose connections.
  2. Use a diagnostic scan tool to retrieve the trouble codes and data related to the charge air cooler system to pinpoint the exact cause of the issue.
  3. Test the charge air cooler coolant pump to ensure it is functioning correctly and replace it if necessary.
  4. Check and refill the coolant levels in the system to ensure proper operation.
  5. Clear the trouble codes from the vehicle's computer and test drive the vehicle to verify that the issue has been resolved.

Cost to Fix P14A0 2018 GMC Sierra

The cost of repairing a P14A0 code on a 2018 GMC Sierra can vary depending on the specific cause of the issue. In general, replacing a charge air cooler coolant pump can range from $200 to $500, including parts and labor. Additional costs may be incurred if there are wiring or connector problems that need to be addressed. It's important to note that diagnostic time and labor rates at auto repair shops can vary, so it's recommended to obtain quotes from multiple sources to get an accurate estimate.

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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 P14A0 2018 GMC Sierra Code

1. What does the OBDII code P14A0 mean on a 2018 GMC Sierra?

P14A0 indicates an issue with the Charge Air Cooler Coolant Pump Status Signal Message Counter, meaning the Engine Control Module (ECM) is detecting irregularities in the signal or communication from the pump.

2. What are the common symptoms of P14A0 on a 2018 GMC Sierra?

Symptoms may include reduced engine performance, decreased fuel efficiency, illuminated check engine light, and potential overheating of the charge air cooler system.

3. What causes the P14A0 code to appear on a 2018 GMC Sierra?

Common causes include a faulty charge air cooler coolant pump, wiring or connector issues, a malfunctioning signal sensor, or a communication error within the ECM.

4. Can I drive my 2018 GMC Sierra with the P14A0 code?

While the vehicle may still be drivable, it’s not recommended, as ignoring the issue could lead to reduced engine performance or further damage to the charge air cooler system.

5. How is the P14A0 code diagnosed on a 2018 GMC Sierra?

A mechanic will typically use a scan tool to verify the code, inspect the charge air cooler coolant pump and wiring, and test the communication signals between the pump and ECM.

6. What repairs are needed to fix the P14A0 code on a 2018 GMC Sierra?

Repairs may include replacing the charge air cooler coolant pump, repairing or replacing damaged wiring or connectors, or reprogramming or replacing the ECM if necessary.

7. How much does it cost to fix the P14A0 code on a 2018 GMC Sierra?

Repair costs can vary, but replacing the charge air cooler coolant pump typically ranges from $300-$600, including parts and labor, depending on your location and shop rates.

8. Can a faulty charge air cooler coolant pump cause other problems?

Yes, a faulty pump can lead to insufficient cooling of the intake air, which can reduce engine efficiency, increase emissions, and potentially cause engine overheating.

9. Is the P14A0 code common in 2018 GMC Sierras?

While not extremely common, it can occur, especially in vehicles with higher mileage or those that have experienced wear and tear on the cooling system components.

10. How can I prevent the P14A0 code from occurring again?

Regular maintenance of the cooling system, including inspecting and replacing coolant pump components as needed, and promptly addressing any warning lights or performance issues, can help prevent recurrence.

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