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P3073 Buick Code - Engine Coolant Pump Low Current

Quick Answer

The P3073 Buick code indicates a low current condition in the engine coolant pump. Common causes include Faulty engine coolant pump, Damaged wiring or connectors, Malfunctioning coolant pump relay. 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 Buick indicates Engine Coolant Pump Low Current.
Common causes
Common causes include Faulty engine coolant pump, Damaged wiring or connectors, Malfunctioning coolant pump relay.
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 15, 2024
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Code P3073 Buick Description

The P3073 Buick code indicates a low current condition in the engine coolant pump. The engine coolant pump, also known as the water pump, plays a crucial role in the vehicle's cooling system by circulating coolant through the engine to maintain optimal operating temperature. When the engine coolant pump is not receiving enough current, it can lead to inadequate coolant circulation, resulting in overheating and potential engine damage.

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

Common Causes of P3073 Buick

  1. Faulty engine coolant pump
  2. Damaged wiring or connectors
  3. Malfunctioning coolant pump relay
  4. Issues with the vehicle's electrical system
  5. Low coolant level

Symptoms of P3073 Buick

  1. Engine overheating
  2. Coolant leaks
  3. Reduced engine performance
  4. Illuminated temperature warning light
  5. Engine running hot

How to Fix P3073 Buick

  1. Perform a visual inspection of the engine coolant pump, wiring, and connectors to check for any visible damage or corrosion.
  2. Test the engine coolant pump relay to ensure it is functioning correctly.
  3. Use a multimeter to measure the current flow to the engine coolant pump and identify any abnormalities.
  4. Replace the engine coolant pump if it is found to be faulty.
  5. Clear the diagnostic trouble codes and test the vehicle to ensure the issue has been resolved.

Cost to Fix P3073 Buick

The typical repair costs for addressing a P3073 Buick code related to the engine coolant pump low current condition can range from $200 to $500, including parts and labor. However, it is essential to note that 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. Auto repair shops commonly charge between $80 and $150 per hour for labor, with rates potentially higher in metropolitan areas or at dealerships and lower at independent shops. It is recommended to inquire about local rates for a more accurate estimate.

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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 Buick Code

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

P3073 indicates "Engine Coolant Pump Low Current," meaning the vehicle’s engine control module (ECM) has detected an issue with the electrical current or performance of the coolant pump.

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

Common symptoms include overheating, the check engine light turning on, poor engine performance, or unusual noises from the coolant pump.

3. What causes the P3073 code to appear?

Potential causes include a failing or damaged coolant pump, electrical wiring issues, a blown fuse, or a malfunctioning engine control module.

4. Can I drive my Buick with the P3073 code active?

Driving with the P3073 code is not recommended as it may lead to engine overheating, which can cause severe engine damage if not addressed promptly.

5. How is the P3073 code diagnosed?

A mechanic will use a scan tool to confirm the code, inspect the coolant pump, check for proper electrical connections, and test the voltage and current flow to the pump.

6. What repairs can fix the P3073 code?

Repairs may include replacing the coolant pump, fixing damaged wiring, replacing a blown fuse, or reprogramming or replacing the ECM if it’s faulty.

7. How much does it cost to repair the P3073 code on a Buick?

Repair costs vary but typically range from $300 to $800, depending on whether the coolant pump or electrical components need replacement.

8. Can a faulty thermostat cause the P3073 code?

No, the P3073 code specifically relates to the engine coolant pump’s electrical current and not the thermostat.

9. Is the P3073 code common in Buicks?

While not overly common, it can occur in models with electrically driven coolant pumps, especially as the pump ages.

10. How can I prevent the P3073 code from occurring?

Regular maintenance, such as inspecting the cooling system, ensuring proper electrical connections, and replacing worn-out components, can help prevent this issue.

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