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P14A6 Infiniti Code - Charge Air Cooler Cooling Electric Water Pump

Quick Answer

The P14A6 code indicates an issue with the Charge Air Cooler (CAC) Cooling Electric Water Pump, which plays a critical role in the vehicle's forced induction system. Common causes include Charge Air Cooler (CAC) coolant leakage, leading to insufficient coolant flow, Contaminated coolant, which can cause pump failure or inefficiency, Electrical issues, such as a faulty wiring harness or connector related to the pump. 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
P14A6 Infiniti indicates Charge Air Cooler Cooling Electric Water Pump.
Common causes
Common causes include Charge Air Cooler (CAC) coolant leakage, leading to insufficient coolant flow, Contaminated coolant, which can cause pump failure or inefficiency, Electrical issues, such as a faulty wiring harness or connector related to the pump.
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 P14A6 Infiniti Description

The P14A6 code indicates an issue with the Charge Air Cooler (CAC) Cooling Electric Water Pump, which plays a critical role in the vehicle's forced induction system. This pump is responsible for circulating coolant through the intercooler, which cools the compressed air generated by the turbocharger or supercharger before it enters the engine. By maintaining a lower temperature of the intake air, the pump enhances air density, leading to improved combustion efficiency, increased power output, and better overall engine performance. The electric water pump operates under the control of the Engine Control Module (ECM), which adjusts its speed based on various parameters such as engine load, coolant temperature, and ambient conditions. If the P14A6 code is triggered, it may indicate that the pump is malfunctioning, leading to inadequate cooling of the intake air. Ignoring this issue can result in elevated intake air temperatures, which may cause engine knocking, reduced performance, and potential long-term damage to engine components. Over time, excessive heat can lead to premature wear of the turbocharger or supercharger, decreased fuel efficiency, and increased emissions. Therefore, addressing the P14A6 code promptly is essential for maintaining optimal engine performance and longevity.
OBDII Code P14A6 Infiniti - Charge Air Cooler Cooling Electric Water Pump
P14A6 Infiniti Code - Charge Air Cooler Cooling Electric Water Pump

Common Causes of P14A6 Infiniti

  1. Charge Air Cooler (CAC) coolant leakage, leading to insufficient coolant flow
  2. Contaminated coolant, which can cause pump failure or inefficiency
  3. Electrical issues, such as a faulty wiring harness or connector related to the pump
  4. Malfunctioning Charge Air Cooler Cooling Electric Water Pump
  5. Faulty Engine Control Module (ECM) programming or failure affecting pump operation

Symptoms of P14A6 Infiniti

  1. Engine Light ON (or Service Engine Soon Warning Light)
  2. Reduced engine performance or power loss during acceleration
  3. Increased intake air temperatures, leading to potential engine knocking
  4. Unusual noises from the engine bay, particularly from the pump area
  5. Coolant leaks around the Charge Air Cooler or associated components

How to Fix P14A6 Infiniti

  1. Perform a diagnostic scan to confirm the P14A6 code and check for any related codes.
  2. Inspect the Charge Air Cooler and associated hoses for leaks or damage.
  3. Test the electrical connections and wiring to the electric water pump for continuity and proper voltage.
  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 proper coolant levels are maintained.

Cost to Fix P14A6 Infiniti

The cost to diagnose and repair the P14A6 code typically ranges from $300 to $800, depending on the specific issue and the vehicle make and model. Parts such as the electric water pump can cost between $150 and $400, while labor costs can vary significantly based on the shop's hourly rate, which generally falls between $80 and $150 per hour. Dealerships may charge more, while independent shops might offer lower rates. Always consider local labor rates and the complexity of the repair when estimating total costs.

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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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