AutoCodes – Infiniti – P14A4 Infiniti

P14A4 Infiniti Code - Charge Air Cooler Cooling Electric Water Pump

Quick Answer

The Charge Air Cooler (CAC) Cooling Electric Water Pump is an electric pump that circulates coolant through the intercooler system to lower the temperature of the air entering the engine. Common causes include Charge Air Cooler (CAC) coolant leakage, Charge Air Cooler coolant is mixed in air, Protection control is activated during pump idle running. 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: P14A4 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 in air, Protection control is activated during pump idle running.
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.

Save to My Repairs My Repairs

AI answers can be wrong. Verify repairs with testing. Open full chat

Code Popularity 89

How popular is this code, among other codes? Low

Repair Importance Level

Urgent (Diagnose now) (3 / 3)

Repair Difficulty Level

Advanced (Pro) (3 / 3)

What is this?

Table of contents Created and updated by William Orellana on Oct 10, 2025

Description
Possible Causes
How To Fix
Cost to Diagnose
Comments
Add Comment

💬 Need more help? Ask Coddy for instant answers — it's free!

Code P14A4 Infiniti Description

The Charge Air Cooler (CAC) Cooling Electric Water Pump is an electric pump that circulates coolant through the intercooler system to lower the temperature of the air entering the engine. By moving coolant between the charge air cooler and a small radiator, it helps remove heat from the compressed intake air produced by the turbocharger or supercharger. This keeps the intake air cooler and denser, improving engine performance, efficiency, and reliability. The pump is controlled by the ECM and adjusts its speed based on engine load and temperature conditions.

OBDII Code P14A4 Infiniti - Charge Air Cooler Cooling Electric Water Pump - AutoCodes.com — P14A4 Infiniti Code - Charge Air Cooler Cooling Electric Water Pump

What does this mean?

What are the Possible Causes of the DTC P14A4 Infiniti?

Charge Air Cooler (CAC) coolant leakage
Charge Air Cooler coolant is mixed in air
Protection control is activated during pump idle running
Faulty Charge Air Cooler Cooling Electric Water Pump

How to Fix the DTC P14A4 Infiniti?

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 P14A4 Infiniti 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 P14A4 Infiniti code?

Need more information on how to fix the P14A4 Infiniti code? Get Access to Factory Service Manuals

Need Help with the Code?

Get the P14A4 Infiniti code diagnosed by a professional: Find a repair shop in your area

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.