AutoCodes – Buick – U0672 Buick

U0672 Buick Code - Lost Communication With Engine Coolant Pump

Quick Answer

The cooling system's function is to maintain an efficient engine operating temperature during all engine speeds and operating conditions. Common causes include Faulty Engine Coolant Pump, Engine Coolant Pump harness is open or shorted, Engine Coolant Pump circuit poor electrical connection. 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: U0672 Buick indicates Lost Communication With Engine Coolant Pump.
Common causes: Common causes include Faulty Engine Coolant Pump, Engine Coolant Pump harness is open or shorted, Engine Coolant Pump circuit poor electrical connection.
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 457

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 Aug 19, 2022

Description
Possible Causes
How To Fix
Cost to Diagnose
FAQs
Comments
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Code U0672 Buick Description

The cooling system's function is to maintain an efficient engine operating temperature during all engine speeds and operating conditions. The cooling system is designed to remove various amounts of the heat produced by the burning of the air-fuel mixture. When the engine is cold, the coolant does not flow to the radiator until the thermostat opens. This allows the engine to warm up quickly. The Diagnostic Trouble Code (DTC) will be set when the serial data circuit current is out of range.

OBDII Code U0672 Buick - Lost Communication With Engine Coolant Pump - AutoCodes.com — U0672 Buick Code - Lost Communication With Engine Coolant Pump

What does this mean?

What are the Possible Causes of the DTC U0672 Buick?

Faulty Engine Coolant Pump
Engine Coolant Pump harness is open or shorted
Engine Coolant Pump circuit poor electrical connection
Faulty Engine Control Module (ECM)

How to Fix the DTC U0672 Buick?

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 U0672 Buick 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 U0672 Buick code?

Need more information on how to fix the U0672 Buick code? Get Access to Factory Service Manuals

Need Help with the Code?

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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.

Frequently Asked Questions about U0672 Buick Code

1. What are common symptoms of OBDII code U0672 in a Buick related to lost communication with the engine coolant pump?

- Common symptoms include engine overheating, erratic coolant pump operation, and dashboard warning lights related to the cooling system.

2. What are some possible causes of OBDII code U0672 in a Buick?

- Possible causes include a faulty engine coolant pump, damaged wiring or connectors, a malfunctioning control module, or a communication network issue.

3. How can I diagnose the issue causing OBDII code U0672 in my Buick?

- Diagnose the issue by checking the coolant pump for proper operation, inspecting wiring and connectors for damage, and using a diagnostic tool to scan for communication errors.

4. Can I still drive my Buick with OBDII code U0672 present?

- It is not recommended to drive your Buick with this code present, as it can lead to engine overheating and other cooling system issues.

5. How can I clear OBDII code U0672 from my Buick's system?

- Clear the code by fixing the underlying issue causing the communication loss with the engine coolant pump, then using a diagnostic tool to clear the code.

6. Is it safe to continue driving if my Buick's engine coolant pump is not communicating properly?

- It is not safe to continue driving if the engine coolant pump is not communicating properly, as it can lead to serious engine damage from overheating.

7. Are there any simple repair tips for resolving OBDII code U0672 in a Buick?

- Simple repair tips include checking and securing wiring connections, ensuring the coolant pump is functioning correctly, and resetting the system after repairs.

8. How much does it typically cost to repair OBDII code U0672 in a Buick?

- The cost to repair this code can vary depending on the underlying issue, but it may range from a simple wiring repair to a more involved coolant pump replacement.

9. Can a DIY enthusiast fix OBDII code U0672 in a Buick, or is it better left to professionals?

- DIY enthusiasts with automotive repair experience may be able to address the issue causing this code, but it is recommended to consult a professional for accurate diagnosis and repair.

10. What long-term effects can OBDII code U0672 have on my Buick if left unresolved?

- Leaving this code unresolved can lead to engine overheating, potential coolant pump failure, and other cooling system issues that may result in costly repairs or engine damage.