AutoCodes – Cadillac – P1E38 Cadillac

P1E38 Cadillac Code - Auxiliary Transmission Fluid Pump Inverter Supply Voltage Circuit

Quick Answer

The power inverter motor, 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 Program Power Inverter Module, Faulty Power Inverter Module, Power Inverter Module harness is open or shorted. 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
P1E38 Cadillac indicates Auxiliary Transmission Fluid Pump Inverter Supply Voltage Circuit.
Common causes
Common causes include Program Power Inverter Module, Faulty Power Inverter Module, Power Inverter Module harness is open or shorted.
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.
AI answers can be wrong. Verify repairs with testing. Open full chat
Code Popularity 680
How popular is this code, among other codes? Low
Table of contents Created and updated by William Orellana on Apr 23, 2020
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Code P1E38 Cadillac Description

The power inverter motor, 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. The hybrid powertrain control module and the motor control modules share the power inverter module ignition voltage circuit, battery voltage circuits and chassis earth.
OBDII Code P1E38 Cadillac - Auxiliary Transmission Fluid Pump Inverter Supply Voltage Circuit - AutoCodes.com
P1E38 Cadillac Code - Auxiliary Transmission Fluid Pump Inverter Supply Voltage Circuit

What are the Possible Causes of the DTC P1E38 Cadillac?

  • Program Power Inverter Module
  • Faulty Power Inverter Module
  • Power Inverter Module harness is open or shorted
  • Power Inverter Module circuit poor electrical connection

How to Fix the DTC P1E38 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 P1E38 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.

Need more information about the P1E38 Cadillac code?

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Need Help with the Code?

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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 P1E38 Cadillac Code

1. What are common symptoms of OBDII code P1E38 in a Cadillac related to the Auxiliary Transmission Fluid Pump Inverter Supply Voltage Circuit?

- Common symptoms include erratic shifting, transmission slippage, and illumination of the check engine light.

2. What are possible causes of OBDII code P1E38 in a Cadillac?

- Possible causes include a faulty auxiliary transmission fluid pump inverter, damaged wiring or connectors, low transmission fluid level, or a defective transmission fluid pump.

3. How can I diagnose the issue related to OBDII code P1E38 in a Cadillac?

- Diagnosing the issue involves using a diagnostic scanner to retrieve the specific fault code, checking the transmission fluid level, inspecting the wiring and connectors for damage, and testing the auxiliary transmission fluid pump inverter.

4. Can I continue driving my Cadillac with OBDII code P1E38 present?

- It is not recommended to continue driving the vehicle with this fault code present, as it can lead to further damage to the transmission system.

5. What are some repair tips for resolving OBDII code P1E38 in a Cadillac?

- Repair tips include checking and repairing any damaged wiring or connectors, replacing the faulty auxiliary transmission fluid pump inverter, ensuring the transmission fluid level is correct, and clearing the fault code with a diagnostic scanner.

6. Is it safe to reset the OBDII code P1E38 in a Cadillac without fixing the underlying issue?

- It is not recommended to reset the code without addressing the underlying problem, as it can lead to recurring issues and potentially cause further damage to the vehicle's transmission system.

7. How much does it typically cost to repair OBDII code P1E38 in a Cadillac?

- The cost of repair can vary depending on the specific issue causing the fault code, but it may involve replacement of the auxiliary transmission fluid pump inverter, wiring repairs, and labor costs.

8. Can a DIY enthusiast fix OBDII code P1E38 in a Cadillac?

- While some basic troubleshooting and repairs can be done by DIY enthusiasts, diagnosing and repairing issues related to the auxiliary transmission fluid pump inverter supply voltage circuit may require specialized tools and expertise, so professional assistance is often recommended.

9. Are there any recalls or technical service bulletins related to OBDII code P1E38 in Cadillac vehicles?

- It's recommended to check with a Cadillac dealership or the manufacturer's website for any recalls or technical service bulletins related to this specific fault code to see if there are any known issues or remedies.

10. How can I prevent OBDII code P1E38 from recurring in my Cadillac?

- To prevent the fault code from recurring, it's important to address the root cause of the issue, perform regular maintenance on the transmission system, and address any related issues promptly to maintain the health of the vehicle's components.

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