AutoCodes – Cadillac – P1E22 Cadillac

P1E22 Cadillac 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 Cadillac 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.

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Code Popularity 812

How popular is this code, among other codes? Low

Repair Importance Level

Urgent (Diagnose now) (3 / 3)

Repair Difficulty Level

Advanced (Pro) (3 / 3)

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

1. What does the OBDII code P1E22 mean on a Cadillac?

P1E22 indicates that the Auxiliary Transmission Fluid Pump Control Module has detected a loss of voltage system isolation in the hybrid or EV battery system.

2. What are the common symptoms of code P1E22?

Common symptoms include warning lights on the dashboard, reduced hybrid/EV performance, limited driving range, and potential failure of the auxiliary transmission fluid pump.

3. What causes the P1E22 code to appear?

This code is typically caused by issues such as damaged wiring, faulty isolation resistance sensors, degraded battery insulation, or a malfunctioning auxiliary transmission fluid pump control module.

4. Can I drive my Cadillac with a P1E22 code?

Driving with a P1E22 code is not recommended, as it may lead to further damage to the hybrid/EV system or cause the vehicle to enter limp mode.

5. How do I diagnose the P1E22 code on my Cadillac?

Diagnosis involves checking the hybrid/EV battery system for insulation failures, inspecting the wiring and connectors for damage, and testing the auxiliary transmission fluid pump control module.

6. How is the P1E22 code fixed?

Repairs may include replacing damaged wiring, repairing insulation issues in the hybrid battery system, or replacing a faulty auxiliary transmission fluid pump control module.

7. What tools are needed to troubleshoot the P1E22 code?

Youâ€™ll need an OBDII scanner capable of reading hybrid/EV-specific codes, a multimeter for checking voltage and continuity, and potentially a megohmmeter for insulation testing.

8. How much does it cost to fix the P1E22 code?

Repair costs can vary widely but may range from $200 to $1,000 or more depending on whether the issue involves simple wiring repairs or replacement of major components like the control module.

9. What happens if the P1E22 code is ignored?

Ignoring the P1E22 code can lead to further damage to the electrical or hybrid/EV battery system, reduced vehicle performance, or complete system failure.

10. Is the P1E22 code unique to Cadillacs?

While P1E22 is a manufacturer-specific code often associated with Cadillac hybrid/EV models, similar codes may be present in other GM vehicles with hybrid systems.