AutoCodes – Generic – P1E1A

P1E1A Code - Auxiliary Transmission Fluid Pump Control Module System Voltage High

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 Power Inverter Module, Power Inverter Module harness is open or shorted, Power Inverter Module 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: P1E1A indicates Auxiliary Transmission Fluid Pump Control Module System Voltage High.
Common causes: Common causes include Faulty Power Inverter Module, Power Inverter Module harness is open or shorted, Power Inverter Module 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 1,009

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 Jul 04, 2022

Description
Possible Causes
How To Fix
Cost to Diagnose
FAQs
Comments
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Code P1E1A 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. 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 P1E1A - Auxiliary Transmission Fluid Pump Control Module System Voltage High - AutoCodes.com — P1E1A Code - Auxiliary Transmission Fluid Pump Control Module System Voltage High

What does this mean?

What are the Possible Causes of the DTC P1E1A?

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

How to Fix the DTC P1E1A?

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 P1E1A 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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Information for Specific Makes

P1E1A Buick — Auxiliary Transmission Fluid Pump Control Module System Voltage High
P1E1A Cadillac — Auxiliary Transmission Fluid Pump Control Module System Voltage High
P1E1A Chevrolet — Auxiliary Transmission Fluid Pump Control Module System Voltage High
P1E1A GMC — Auxiliary Transmission Fluid Pump Control Module System Voltage High
P1E1A Saturn — Auxiliary Transmission Fluid Pump Control Module System Voltage High

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 P1E1A Code

1. What does the OBDII code P1E1A mean?

The code P1E1A indicates that the Auxiliary Transmission Fluid Pump Control Module is detecting a system voltage that is higher than the specified range.

2. What are the common symptoms of the P1E1A code?

Symptoms may include a check engine light, erratic shifting, reduced transmission performance, or the vehicle entering limp mode.

3. What causes the P1E1A code to appear?

Common causes include a faulty auxiliary transmission fluid pump control module, wiring issues like damaged or corroded wires, or a malfunctioning alternator causing overvoltage.

4. Can a bad battery trigger the P1E1A code?

Yes, a failing or improperly installed battery can lead to voltage irregularities that may trigger this code.

5. How do I diagnose the P1E1A code?

Diagnosis involves checking the control module wiring and connectors for damage, testing the alternator output, and inspecting the auxiliary transmission fluid pump for faults.

6. Is the P1E1A code safe to drive with?

Driving with this code is not recommended as it can lead to transmission performance issues and potentially cause further damage.

7. How is the P1E1A code fixed?

Repairs may include replacing the auxiliary transmission fluid pump control module, repairing damaged wiring, or addressing any voltage regulation issues caused by the alternator or battery.

8. Can clearing the P1E1A code fix the problem?

Clearing the code may temporarily turn off the check engine light, but the underlying issue must be resolved to prevent the code from reappearing.

9. How much does it cost to fix the P1E1A code?

Repair costs vary but may range from $200 to $800 or more depending on the specific cause, such as replacing the control module or repairing electrical components.

10. Can the P1E1A code be caused by a software issue?

Yes, in some cases, outdated or corrupted software in the transmission control module may trigger this code and require reprogramming.