AutoCodes – Generic – P14A5

P14A5 Code - Charge Air Cooler Coolant Pump Control Circuit High

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: P14A5 indicates Charge Air Cooler Coolant Pump Control Circuit High.
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.

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Code Popularity 7,275

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
FAQs
Comments
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Code P14A5 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 P14A5 - Charge Air Cooler Coolant Pump Control Circuit High - AutoCodes.com — P14A5 Code - Charge Air Cooler Coolant Pump Control Circuit High

What does this mean?

What are the Possible Causes of the DTC P14A5?

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 P14A5?

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 P14A5 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 P14A5 code?

Need more information on how to fix the P14A5 code? Get Access to Factory Service Manuals

Need Help with the Code?

Get the P14A5 code diagnosed by a professional: Find a repair shop in your area

Information for Specific Makes

P14A5 BMW — Exhaust Gas Temperature Sensor Short Circuit To Earth
P14A5 Infiniti — Charge Air Cooler Coolant Pump Control Circuit High
P14A5 MINI — Exhaust Gas Temperature Sensor Short Circuit To Earth
P14A5 Nissan — Charge Air Cooler Coolant Pump Control Circuit High

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 P14A5 Code

1. What is an OBDII code P14A5?

Code P14A5 indicates a problem with the exhaust gas temperature sensor, specifically a short circuit to earth (ground). This means the sensor or its wiring is accidentally connected to the vehicleâ€™s chassis or another ground source.

2. What symptoms might I notice if my vehicle has the P14A5 code?

Symptoms can include a check engine light, reduced engine performance, increased fuel consumption, and possibly higher emissions. In some cases, the vehicle might enter a limp mode to protect the engine from potential damage.

3. What causes the P14A5 code to appear?

The P14A5 code can be triggered by several issues including damaged wiring to the exhaust gas temperature sensor, a faulty sensor, corrosion at the sensor connection, or problems with the engine control module (ECM).

4. How can I fix the P14A5 error code?

Repairing this code may involve inspecting and repairing or replacing the wiring harness if itâ€™s damaged or shorted, replacing the faulty exhaust gas temperature sensor, cleaning corrosion from connectors, or in rare cases, replacing or reprogramming the ECM.

5. Is it safe to drive with the P14A5 code?

While you might be able to drive with this code active, it is not advisable as it can lead to poorer engine performance and higher emissions. Continued driving could also cause further damage to the engine or exhaust system components.

6. How do I diagnose the problem causing the P14A5 code?

Diagnosis should start with using an OBDII scanner to confirm the code. Inspect the exhaust gas temperature sensor and its connections for visible damage or corrosion. Electrical testing with a multimeter can help determine if there is a short to ground in the circuit.

7. Can a P14A5 code impact the vehicle's fuel economy?

Yes, a malfunctioning exhaust gas temperature sensor can lead to inaccurate readings, which may cause the engine management system to run the engine richer or leaner than necessary, reducing fuel efficiency.