AutoCodes – Cadillac – P1E39 Cadillac

P1E39 Cadillac 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 Cadillac 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 750

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

What does this mean?

What are the Possible Causes of the DTC P1E39 Cadillac?

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 Cadillac?

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 Cadillac 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 Cadillac Code

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

P1E39 indicates an issue with the Auxiliary Transmission Fluid Pump Inverter's performance, meaning it may not be functioning as expected.

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

Symptoms may include poor transmission performance, the vehicle entering limp mode, warning lights on the dash, or overheating transmission fluid.

3. What causes the P1E39 code to be triggered?

Possible causes include a faulty auxiliary transmission fluid pump, inverter failure, damaged wiring, or poor electrical connections.

4. Can I drive my Cadillac with a P1E39 code?

While the vehicle may still be drivable, driving with this code can cause transmission damage or overheating, so itâ€™s best to address the issue promptly.

5. How is the P1E39 code diagnosed?

A technician will use a diagnostic scanner to confirm the code, inspect the auxiliary pump and inverter, and check wiring and connections for faults.

6. What repairs are typically needed for a P1E39 code?

Repairs may involve replacing the auxiliary transmission fluid pump, repairing or replacing damaged wiring, or replacing the inverter if itâ€™s faulty.

7. How much does it cost to repair a P1E39 code on a Cadillac?

Costs can vary widely but may range from $300 to $1,000 or more, depending on whether the pump, inverter, or wiring needs repair or replacement.

8. Can a low transmission fluid level cause a P1E39 code?

No, low transmission fluid typically doesnâ€™t directly cause this code, but it can lead to overheating and stress on the pump, contributing to related failures.

9. What tools are needed to fix a P1E39 code?

Youâ€™ll need a diagnostic scanner, multimeter for electrical testing, and possibly tools to access and replace the auxiliary transmission pump or inverter.

10. Is the P1E39 code specific to Cadillacs?

Yes, the P1E39 code is manufacturer-specific and primarily appears in Cadillac vehicles with systems that use an auxiliary transmission fluid pump inverter.