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P14AA Nissan Code - Charge Air Cooler Cooling Electric Water Pump

Quick Answer

The diagnostic code P14AA refers to an issue with the Charge Air Cooler (CAC) Cooling Electric Water Pump, which plays a crucial role in maintaining optimal engine performance. Common causes include Charge Air Cooler (CAC) coolant leakage, Contamination of the coolant with air, leading to inefficient cooling, Protection control activated during pump idle running, indicating a fault. 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
P14AA Nissan indicates Charge Air Cooler Cooling Electric Water Pump.
Common causes
Common causes include Charge Air Cooler (CAC) coolant leakage, Contamination of the coolant with air, leading to inefficient cooling, Protection control activated during pump idle running, indicating a fault.
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 Oct 11, 2025
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Code P14AA Nissan Description

The diagnostic code P14AA refers to an issue with the Charge Air Cooler (CAC) Cooling Electric Water Pump, which plays a crucial role in maintaining optimal engine performance. This electric pump is responsible for circulating coolant through the intercooler system, effectively lowering the temperature of the air entering the engine. By facilitating the movement of coolant between the charge air cooler and a small radiator, the pump helps dissipate heat from the compressed intake air generated by the turbocharger or supercharger. Cooler intake air is denser, which enhances combustion efficiency, power output, and overall engine performance.
OBDII Code P14AA Nissan - Charge Air Cooler Cooling Electric Water Pump
P14AA Nissan Code - Charge Air Cooler Cooling Electric Water Pump

Common Causes of P14AA Nissan

  1. Charge Air Cooler (CAC) coolant leakage
  2. Contamination of the coolant with air, leading to inefficient cooling
  3. Protection control activated during pump idle running, indicating a fault
  4. Faulty Charge Air Cooler Cooling Electric Water Pump
  5. Electrical issues such as damaged wiring or poor connections affecting pump operation

Symptoms of P14AA Nissan

  1. Engine Light ON (or Service Engine Soon Warning Light)
  2. Decreased engine performance or power loss
  3. Increased engine temperatures during operation
  4. Unusual noises from the engine compartment, particularly when the pump is running
  5. Coolant leaks around the charge air cooler area

How to Fix P14AA Nissan

  1. Perform a diagnostic scan to confirm the P14AA code and check for any related codes.
  2. Inspect the Charge Air Cooler and associated hoses for signs of coolant leaks or damage.
  3. Test the functionality of the CAC Cooling Electric Water Pump to ensure it operates correctly.
  4. Replace the Charge Air Cooler Cooling Electric Water Pump if it is found to be faulty.
  5. Flush and replace the coolant if contamination is detected, ensuring the system is filled with the correct type and mixture of coolant.

Cost to Fix P14AA Nissan

The cost to diagnose and repair issues related to the P14AA code can vary significantly based on the specific repairs needed. Typically, parts for a replacement Charge Air Cooler Cooling Electric Water Pump range from $100 to $300, while labor costs can range from $80 to $150 per hour, depending on the shop. Dealerships may charge higher rates, while independent shops may offer more competitive pricing. Overall, you can expect total repair costs to fall between $300 and $800, depending on the complexity of the issue and the vehicle make and model.

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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.

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