AutoCodes – Buick – P1E39 Buick

P1E39 Buick Code - Auxiliary Transmission Fluid Pump Inverter Performance

Quick Answer

The power inverter module, often referred to as the drive motor generator power inverter module, contains three motor control modules and the hybrid powertrain control module. Common causes include Faulty Auxiliary Transmission Fluid Pump, Auxiliary Transmission Fluid Pump harness is open or shorted, Auxiliary Transmission Fluid 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: P1E39 Buick indicates Auxiliary Transmission Fluid Pump Inverter Performance.
Common causes: Common causes include Faulty Auxiliary Transmission Fluid Pump, Auxiliary Transmission Fluid Pump harness is open or shorted, Auxiliary Transmission Fluid 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 758

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 Apr 23, 2020

Description
Possible Causes
How To Fix
Cost to Diagnose
FAQs
Comments
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Code P1E39 Buick Description

The power inverter module, often referred to as the drive motor generator power inverter module, contains three motor control modules and the hybrid powertrain control module. Two of the motor control modules operate their respective drive motor generator based upon power inverter module commands. The third motor control module controls the auxiliary transmission fluid pump motor. Each motor control module controls its respective motor through the sequencing actuation of high-current switching transistors called insulated gate bipolar transistors. Each insulated gate bipolar transistor assembly is monitored for fault conditions. The motor control modules are part of the power inverter module and are not serviced separately.

OBDII Code P1E39 Buick - Auxiliary Transmission Fluid Pump Inverter Performance - AutoCodes.com — P1E39 Buick Code - Auxiliary Transmission Fluid Pump Inverter Performance

What does this mean?

What are the Possible Causes of the DTC P1E39 Buick?

Faulty Auxiliary Transmission Fluid Pump
Auxiliary Transmission Fluid Pump harness is open or shorted
Auxiliary Transmission Fluid Pump circuit poor electrical connection

How to Fix the DTC P1E39 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 P1E39 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.

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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 itâ€™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.