AutoCodes – Generic – P1E22

P1E22 Code - Auxiliary Transmission Fluid Pump Control Module Hybrid/EV Battery Voltage System Isolation Lost

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: P1E22 indicates Auxiliary Transmission Fluid Pump Control Module Hybrid/EV Battery Voltage System Isolation Lost.
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.

Save to My Repairs My Repairs

AI answers can be wrong. Verify repairs with testing. Open full chat

Code Popularity 2,554

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
Add Comment

💬 Need more help? Ask Coddy for instant answers — it's free!

Code P1E22 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 P1E22 - Auxiliary Transmission Fluid Pump Control Module Hybrid/EV Battery Voltage System Isolation Lost - AutoCodes.com — P1E22 Code - Auxiliary Transmission Fluid Pump Control Module Hybrid/EV Battery Voltage System Isolation Lost

What does this mean?

What are the Possible Causes of the DTC P1E22?

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 P1E22?

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 P1E22 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 P1E22 code?

Need more information on how to fix the P1E22 code? Get Access to Factory Service Manuals

Need Help with the Code?

Get the P1E22 code diagnosed by a professional: Find a repair shop in your area

Information for Specific Makes

P1E22 Buick — Auxiliary Transmission Fluid Pump Control Module Hybrid/EV Battery Voltage System Isolation Lost
P1E22 Cadillac — Auxiliary Transmission Fluid Pump Control Module Hybrid/EV Battery Voltage System Isolation Lost
P1E22 Chevrolet — Auxiliary Transmission Fluid Pump Control Module Hybrid/EV Battery Voltage System Isolation Lost
P1E22 GMC — Auxiliary Transmission Fluid Pump Control Module Hybrid/EV Battery Voltage System Isolation Lost
P1E22 Saturn — Auxiliary Transmission Fluid Pump Control Module Hybrid/EV Battery Voltage System Isolation Lost

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 P1E22 Code

1. What are the common symptoms of OBDII code P1E22?

- Common symptoms include reduced hybrid or electric vehicle performance, decreased fuel efficiency, and potential warning lights on the dashboard.

2. What could cause the OBDII code P1E22 to trigger?

- The code may be triggered due to a malfunction in the auxiliary transmission fluid pump control module or issues with the Hybrid/EV battery voltage system isolation.

3. How can I diagnose the issue related to code P1E22?

- Diagnosis typically involves using a professional OBDII scanner to read the code, inspecting the auxiliary transmission fluid pump control module, and checking the Hybrid/EV battery voltage system components.

4. What are the potential repair options for resolving code P1E22?

- Repair options may include replacing the faulty auxiliary transmission fluid pump control module, repairing any damaged wiring or connections in the Hybrid/EV battery voltage system, or resetting the system.

5. Can I continue driving with OBDII code P1E22 present?

- It is not recommended to ignore the code and continue driving, as it may lead to further damage to the vehicle's hybrid or electric components. It's best to address the issue promptly.

6. How much does it typically cost to repair OBDII code P1E22?

- The cost of repair can vary depending on the extent of the issue and the specific components that need attention. It's advisable to consult a professional mechanic for an accurate estimate.

7. Are there any DIY tips for troubleshooting code P1E22?

- DIY tips may include checking the battery connections, ensuring proper fluid levels, and inspecting the wiring for any visible damage. However, complex issues may require professional assistance.

8. Is OBDII code P1E22 specific to hybrid or electric vehicles only?

- Yes, this code is specific to hybrid or electric vehicles due to its relation to the auxiliary transmission fluid pump control module and the Hybrid/EV battery voltage system.

9. Can a faulty battery be a potential cause of OBDII code P1E22?

- Yes, a faulty Hybrid/EV battery can potentially cause the system isolation to be lost, triggering the code P1E22. It's important to have the battery tested if this is suspected.

10. How urgent is it to address OBDII code P1E22?

- It is recommended to address the issue as soon as possible to prevent any further damage to the vehicle's hybrid or electric components and ensure optimal performance and safety.