AutoCodes – GMC – P1E27 GMC

P1E27 GMC Code - Auxiliary Transmission Fluid Pump Control Module Hybrid/EV Battery System Voltage High Voltage

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 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: P1E27 GMC indicates Auxiliary Transmission Fluid Pump Control Module Hybrid/EV Battery System Voltage High Voltage.
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.

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Code Popularity 896

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 P1E27 GMC 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 drive motor control module monitors its internal high voltage sensor for correct operation, no external circuits are involved. The motor control modules and the hybrid powertrain control module are part of the power inverter module and are not serviced separately.

OBDII Code P1E27 GMC - Auxiliary Transmission Fluid Pump Control Module Hybrid/EV Battery System Voltage High Voltage - AutoCodes.com — P1E27 GMC Code - Auxiliary Transmission Fluid Pump Control Module Hybrid/EV Battery System Voltage High Voltage

What does this mean?

What are the Possible Causes of the DTC P1E27 GMC?

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 P1E27 GMC?

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 P1E27 GMC 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 P1E27 GMC Code

1. What are the common symptoms of OBDII code P1E27 in a GMC vehicle?

The common symptoms of code P1E27 include the check engine light coming on, reduced hybrid/EV system performance, and potential issues with the auxiliary transmission fluid pump.

2. What are the possible causes of OBDII code P1E27 in a GMC vehicle?

The code P1E27 in a GMC vehicle can be caused by high voltage in the hybrid/EV battery system, a malfunctioning auxiliary transmission fluid pump control module, or issues with the high voltage system.

3. How can I diagnose the OBDII code P1E27 in my GMC vehicle?

Diagnosing code P1E27 requires using a diagnostic scanner to read the trouble code and investigating the high voltage system, auxiliary transmission fluid pump, and control module for any faults or malfunctions.

4. Can I continue driving my GMC vehicle with OBDII code P1E27 present?

It is not recommended to continue driving your GMC vehicle with code P1E27 present, as it can lead to further damage to the hybrid/EV system components. It is best to address the issue promptly.

5. What are some repair tips for fixing OBDII code P1E27 in a GMC vehicle?

Repairing code P1E27 may involve checking and repairing any wiring or connections related to the high voltage system, replacing a faulty auxiliary transmission fluid pump control module, or addressing issues with the hybrid/EV battery system voltage.

6. Is it safe to reset the OBDII code P1E27 in my GMC vehicle without fixing the underlying issue?

Resetting the code without fixing the underlying issue may temporarily turn off the check engine light, but the problem will likely reoccur. It is crucial to address the root cause of the code to prevent further issues.

7. How much does it typically cost to repair OBDII code P1E27 in a GMC vehicle?

The cost of repairing code P1E27 in a GMC vehicle can vary depending on the specific cause of the issue. It may involve replacing components, repairing wiring, or addressing other related problems, so costs can range from relatively minor to more significant.

8. Can a DIY enthusiast fix OBDII code P1E27 in a GMC vehicle?

While some aspects of diagnosing and repairing code P1E27 may be within reach of a skilled DIY enthusiast, dealing with high voltage systems and complex hybrid/EV components can be challenging and dangerous. It is recommended to seek professional help for this issue.

9. How often does OBDII code P1E27 occur in GMC vehicles?

Code P1E27 is relatively uncommon, but it can occur in GMC vehicles with hybrid/EV systems, particularly those with issues related to the auxiliary transmission fluid pump control module and high voltage system.

10. Are there any recalls or technical service bulletins related to OBDII code P1E27 in GMC vehicles?

It's essential to check with the manufacturer or a qualified dealership for any recalls or technical service bulletins related to code P1E27 in GMC vehicles. They may provide valuable information and guidance on addressing this specific issue.