U0672 GMC Code - Lost Communication With Engine Coolant Pump
Quick Answer
The U0672 GMC code indicates that there is a communication problem between the vehicle's engine control module (ECM) and the engine coolant pump. Common causes include Faulty wiring: Damaged or corroded wiring connecting the ECM to the engine coolant pump can disrupt communication and trigger this code, Defective engine coolant pump: A malfunction in the engine coolant pump itself, such as a failed motor or internal component, can lead to communication issues, Loose or damaged connectors: Loose or damaged connectors between the ECM and the engine coolant pump can result in a loss of communication. 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 GMC indicates Lost Communication With Engine Coolant Pump.
- Common causes
- Common causes include Faulty wiring: Damaged or corroded wiring connecting the ECM to the engine coolant pump can disrupt communication and trigger this code, Defective engine coolant pump: A malfunction in the engine coolant pump itself, such as a failed motor or internal component, can lead to communication issues, Loose or damaged connectors: Loose or damaged connectors between the ECM and the engine coolant pump can result in a loss of communication.
- 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 U0672 GMC Description
The U0672 GMC code indicates that there is a communication problem between the vehicle's engine control module (ECM) and the engine coolant pump. The engine coolant pump is responsible for circulating coolant through the engine to regulate its temperature. When communication is lost with the engine coolant pump, it can lead to issues with the engine's cooling system, potentially causing overheating and engine damage.
Common Causes of U0672 GMC
- Faulty wiring: Damaged or corroded wiring connecting the ECM to the engine coolant pump can disrupt communication and trigger this code.
- Defective engine coolant pump: A malfunction in the engine coolant pump itself, such as a failed motor or internal component, can lead to communication issues.
- Loose or damaged connectors: Loose or damaged connectors between the ECM and the engine coolant pump can result in a loss of communication.
- ECM failure: A malfunction in the engine control module can also cause communication problems with the engine coolant pump.
Symptoms of U0672 GMC
- Engine overheating: One of the most common symptoms associated with this code is engine overheating due to a lack of proper coolant circulation.
- Check Engine Light: The Check Engine Light may illuminate on the dashboard as a result of the communication error between the ECM and the engine coolant pump.
- Poor engine performance: The vehicle may experience a decrease in performance, such as reduced power or acceleration, as a result of the engine coolant pump not functioning correctly.
- Coolant leaks: In some cases, a coolant leak may be present due to the engine coolant pump not operating as it should.
How to Fix U0672 GMC
- Diagnose the issue: Use a diagnostic scanner to retrieve the specific error codes and pinpoint the exact cause of the communication problem.
- Inspect wiring and connectors: Check the wiring harness and connectors for any signs of damage, corrosion, or looseness. Repair or replace as needed.
- Test the engine coolant pump: Test the engine coolant pump to ensure it is functioning correctly. Replace the pump if it is found to be faulty.
- Clear codes and test drive: Clear the error codes from the ECM and test drive the vehicle to ensure that the communication issue has been resolved.
- Perform a coolant system flush: After repairing the communication problem, it is recommended to perform a coolant system flush to ensure proper coolant circulation and engine cooling.
Cost to Fix U0672 GMC
The typical repair costs for addressing a lost communication with the engine coolant pump can range from $200 to $500, including parts and labor. However, the specific diagnosis time and labor rates at auto repair shops can vary based on factors such as location, vehicle make and model, and engine type. It's advisable to check local rates for a more precise estimate. Keep in mind that rates in metropolitan areas or at dealerships may be higher, while independent shops often charge less.
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