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P14A8 Infiniti Code - Charge Air Cooler Cooling Electric Water Pump

Quick Answer

The diagnostic code P14A8 indicates a problem with the Charge Air Cooler (CAC) Cooling Electric Water Pump, a critical component in the intercooler system of turbocharged or supercharged engines. Common causes include Charge Air Cooler (CAC) coolant leakage, Charge Air Cooler coolant is mixed with air, causing inefficiencies, Protection control is 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
P14A8 Infiniti indicates Charge Air Cooler Cooling Electric Water Pump.
Common causes
Common causes include Charge Air Cooler (CAC) coolant leakage, Charge Air Cooler coolant is mixed with air, causing inefficiencies, Protection control is 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 P14A8 Infiniti Description

The diagnostic code P14A8 indicates a problem with the Charge Air Cooler (CAC) Cooling Electric Water Pump, a critical component in the intercooler system of turbocharged or supercharged engines. This electric pump is responsible for circulating coolant through the charge air cooler, which cools the compressed air produced by the turbocharger or supercharger before it enters the engine. By maintaining lower temperatures for the intake air, the pump enhances engine performance, improves fuel efficiency, and ensures optimal combustion. If the pump fails or operates inefficiently, the intake air temperature can rise, leading to decreased engine performance, increased emissions, and potential engine knocking due to pre-ignition. Long-term neglect of this issue can result in overheating, which may cause severe engine damage, including warped cylinder heads or damaged pistons. The pump is controlled by the Engine Control Module (ECM), which adjusts its operation based on various parameters such as engine load and coolant temperature. A malfunction in the pump can trigger the ECM to set the P14A8 code, indicating that the pump is not functioning as intended, which may also affect other systems reliant on proper air intake temperatures.
OBDII Code P14A8 Infiniti - Charge Air Cooler Cooling Electric Water Pump
P14A8 Infiniti Code - Charge Air Cooler Cooling Electric Water Pump

Common Causes of P14A8 Infiniti

  1. Charge Air Cooler (CAC) coolant leakage
  2. Charge Air Cooler coolant is mixed with air, causing inefficiencies
  3. Protection control is activated during pump idle running, indicating a fault
  4. Faulty Charge Air Cooler Cooling Electric Water Pump
  5. Electrical issues, such as wiring faults or poor connections

Symptoms of P14A8 Infiniti

  1. Engine Light ON (or Service Engine Soon Warning Light)
  2. Reduced engine power or sluggish acceleration
  3. Increased engine temperatures during operation
  4. Unusual engine noises, such as knocking or pinging
  5. Decreased fuel efficiency

How to Fix P14A8 Infiniti

  1. Perform a thorough diagnostic to confirm the P14A8 code and identify the root cause.
  2. Inspect the Charge Air Cooler and associated components for leaks or damage.
  3. Test the Charge Air Cooler Cooling Electric Water Pump for proper operation and electrical integrity.
  4. If faulty, replace the Charge Air Cooler Cooling Electric Water Pump with a new unit.
  5. Flush the cooling system and refill with the appropriate coolant to ensure optimal performance.

Cost to Fix P14A8 Infiniti

The cost to diagnose and repair the P14A8 code typically ranges from $300 to $800, depending on the specific issue and the vehicle make and model. Parts for a replacement Charge Air Cooler Cooling Electric Water Pump can range from $150 to $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 higher rates, while independent shops may offer more competitive pricing.

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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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