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Engine-Codes – GMC – P3073 GMC

P3073 GMC Code - Engine Coolant Pump Low Current

Quick Answer

The P3073 GMC code indicates that there is low current detected in the engine coolant pump. Common causes include Faulty engine coolant pump: The pump itself may be malfunctioning, causing low current flow, Wiring issues: Problems with the wiring connecting the engine coolant pump to the control module can result in low current, Faulty control module: A malfunctioning control module can also lead to low current in the engine coolant pump. 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
P3073 GMC indicates Engine Coolant Pump Low Current.
Common causes
Common causes include Faulty engine coolant pump: The pump itself may be malfunctioning, causing low current flow, Wiring issues: Problems with the wiring connecting the engine coolant pump to the control module can result in low current, Faulty control module: A malfunctioning control module can also lead to low current in the engine coolant pump.
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 Sep 17, 2024
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Code P3073 GMC Description

The P3073 GMC code indicates that there is low current detected in the engine coolant pump. The engine coolant pump plays a crucial role in maintaining the optimal operating temperature of the engine by circulating coolant through the system. When the current flowing through the engine coolant pump is lower than expected, it can lead to inadequate coolant circulation, resulting in the engine running hotter than normal. This can potentially cause overheating, reduced engine performance, and even engine damage if not addressed promptly.

OBDII Code P3073 GMC - Engine Coolant Pump Low Current
P3073 GMC Code - Engine Coolant Pump Low Current

Common Causes of P3073 GMC

  1. Faulty engine coolant pump: The pump itself may be malfunctioning, causing low current flow.
  2. Wiring issues: Problems with the wiring connecting the engine coolant pump to the control module can result in low current.
  3. Faulty control module: A malfunctioning control module can also lead to low current in the engine coolant pump.
  4. Electrical issues: Any electrical problems in the system, such as a blown fuse or a short circuit, can trigger this code.

Symptoms of P3073 GMC

  1. Engine overheating: One of the most common symptoms associated with this code is engine overheating due to inadequate coolant circulation.
  2. Reduced engine performance: The vehicle may experience a decrease in power and acceleration as a result of the engine running hotter than normal.
  3. Illuminated check engine light: The check engine light may come on to indicate a problem with the engine coolant pump.
  4. Coolant leaks: Low current in the engine coolant pump can lead to leaks in the cooling system, causing a loss of coolant.

How to Fix P3073 GMC

  1. Diagnose the issue: Use a diagnostic scanner to retrieve the trouble code and perform further testing to pinpoint the exact cause of the low current in the engine coolant pump.
  2. Inspect the engine coolant pump: Check the pump for any signs of damage or wear and tear. Replace the pump if necessary.
  3. Check the wiring: Inspect the wiring harness for any damage, corrosion, or loose connections. Repair or replace any faulty wiring.
  4. Test the control module: Test the control module to ensure it is functioning properly. Replace it if it is found to be faulty.
  5. Clear the code: Once the repairs have been completed, clear the trouble code and test drive the vehicle to ensure the issue has been resolved.

Cost to Fix P3073 GMC

The cost of repairing a P3073 GMC code related to low current in the engine coolant pump can vary depending on the specific cause of the issue and the labor rates in your area. On average, the cost of replacing the engine coolant pump can range from $200 to $500, including parts and labor. Additional costs may be incurred if wiring or the control module needs to be replaced. It is recommended to consult with a qualified mechanic to get an accurate estimate based on your vehicle's make and model. Keep in mind that labor rates at auto repair shops can vary, so it's advisable to shop around for the best price.

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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 P3073 GMC Code

1. What does the OBDII code P3073 mean on a GMC vehicle?

P3073 indicates that the engine control module (ECM) has detected low current in the engine coolant pump circuit, which may affect cooling system performance.

2. What are the common symptoms of code P3073 in a GMC?

Symptoms may include engine overheating, reduced cooling efficiency, illuminated check engine light, or unusual noises from the coolant pump.

3. What causes the P3073 code to appear?

Common causes include a failing electric coolant pump, wiring issues like damaged connectors or harnesses, or a malfunctioning ECM.

4. Can I drive my GMC with a P3073 code?

Driving with this code is not recommended, as it may lead to engine overheating and potential damage to engine components.

5. How do I diagnose the P3073 code on my GMC?

Start by inspecting the coolant pump, wiring, and connectors for damage. Use a multimeter to test for proper current in the pump circuit, and check for any related ECM faults.

6. How can I fix the P3073 code on a GMC?

Repairs may involve replacing the electric coolant pump, repairing or replacing damaged wiring, cleaning corroded connections, or updating the ECM software if needed.

7. How much does it cost to fix the P3073 code?

The cost varies depending on the issue, but replacing an electric coolant pump can range from $300 to $700, while wiring repairs may cost less.

8. Is the P3073 code specific to GMC vehicles?

While P3073 is common in GMC vehicles, it can appear in other makes and models with similar electric coolant pump systems.

9. Can a low coolant level trigger the P3073 code?

Low coolant level itself typically won’t trigger the P3073 code, but it can cause overheating, which might exacerbate pump or system issues.

10. Does the P3073 code require ECM reprogramming?

In some cases, an ECM software update may be needed if the issue is related to incorrect pump operation programming. A professional diagnosis can confirm this.

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