Engine-CodesBuick – P1E39 Buick

P1E39 Buick Code - Auxiliary Transmission Fluid Pump Inverter Performance

Quick Answer

The P1E39 Buick diagnostic trouble code (DTC) specifically refers to the Auxiliary Transmission Fluid Pump Inverter Performance. Common causes include Faulty auxiliary transmission fluid pump inverter, Wiring or connector issues related to the inverter, Malfunctioning transmission fluid 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
P1E39 Buick indicates Auxiliary Transmission Fluid Pump Inverter Performance.
Common causes
Common causes include Faulty auxiliary transmission fluid pump inverter, Wiring or connector issues related to the inverter, Malfunctioning transmission fluid 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.
Table of contents Created and updated by William Orellana on Sep 16, 2024
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Code P1E39 Buick Description

The P1E39 Buick diagnostic trouble code (DTC) specifically refers to the Auxiliary Transmission Fluid Pump Inverter Performance. In vehicles equipped with hybrid powertrains, this code indicates an issue with the auxiliary transmission fluid pump inverter, which is responsible for controlling the operation of the pump that circulates transmission fluid in the hybrid transmission system. The transmission fluid pump plays a crucial role in maintaining proper lubrication and cooling of the transmission components, ensuring smooth operation and preventing overheating.

OBDII Code P1E39 Buick - Auxiliary Transmission Fluid Pump Inverter Performance
P1E39 Buick Code - Auxiliary Transmission Fluid Pump Inverter Performance

Common Causes of P1E39 Buick

  1. Faulty auxiliary transmission fluid pump inverter
  2. Wiring or connector issues related to the inverter
  3. Malfunctioning transmission fluid pump
  4. Low transmission fluid levels
  5. Electrical system problems affecting the inverter operation

Symptoms of P1E39 Buick

  1. Illumination of the Check Engine Light on the dashboard
  2. Transmission slipping or shifting erratically
  3. Reduced fuel efficiency
  4. Unusual noises coming from the transmission system
  5. Transmission overheating warning message or indicator

How to Fix P1E39 Buick

  1. Perform a comprehensive diagnostic scan to retrieve the specific trouble codes related to the auxiliary transmission fluid pump inverter performance.
  2. Inspect the wiring, connectors, and electrical components associated with the inverter for any signs of damage or corrosion.
  3. Test the auxiliary transmission fluid pump inverter using specialized diagnostic equipment to determine if it is functioning correctly.
  4. Check the transmission fluid level and condition, topping up or replacing as necessary.
  5. Replace the auxiliary transmission fluid pump inverter or transmission fluid pump if they are found to be faulty.

Cost to Fix P1E39 Buick

The typical repair costs for addressing the P1E39 Buick code can vary depending on the extent of the issue and the specific components that require repair or replacement. In general, the parts needed for this repair, such as a new auxiliary transmission fluid pump inverter or transmission fluid pump, can range from $200 to $500. Labor costs at an auto repair shop can add an additional $200 to $400 to the total bill. Keep in mind that these are rough estimates, and actual costs may vary based on factors such as location, vehicle make and model, and the mechanic's hourly labor rates. It is advisable to obtain quotes from local auto repair shops to get a more accurate cost estimate for this repair.

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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 P1E39 Buick Code

1. What does the OBDII code P1E39 mean on a Buick?

The code P1E39 indicates an issue with the Auxiliary Transmission Fluid Pump Inverter Performance, suggesting a potential malfunction in the inverter or its related components.

2. What are the common symptoms of the P1E39 code?

Common symptoms include transmission overheating, erratic shifting, reduced fuel efficiency, and possible illumination of the check engine light.

3. What causes the P1E39 code to be triggered?

The code may be caused by a faulty auxiliary transmission fluid pump, a malfunctioning inverter, wiring issues, or a problem with the control module.

4. Can I drive my Buick with the P1E39 code?

While the vehicle may still be drivable, continued use with this code can lead to transmission damage or reduced performance, so it’s best to address the issue promptly.

5. How is the P1E39 code diagnosed?

A technician will use a scan tool to confirm the code, inspect wiring and connectors, test the auxiliary pump and inverter, and check for related transmission system issues.

6. What repairs are needed to fix the P1E39 code?

Repairs may include replacing the auxiliary transmission fluid pump, repairing or replacing damaged wiring, or reprogramming/updating the powertrain control module.

7. Is the P1E39 code related to low transmission fluid?

While not directly related, low or degraded transmission fluid can exacerbate transmission issues and may contribute to triggering the code.

8. How much does it cost to fix the P1E39 code on a Buick?

Repair costs depend on the specific issue but may range from $200 to $1,000, depending on whether the pump, inverter, or wiring needs replacement.

9. Can a dead battery cause the P1E39 code?

Yes, a weak or dead battery can cause electrical issues that may trigger this code, as the inverter relies on proper voltage to function.

10. How can I prevent the P1E39 code from occurring?

Regular maintenance, including checking transmission fluid levels, inspecting electrical connections, and addressing warning signs promptly, can help prevent this code.

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