AutoCodes – Cadillac – P1E20 Cadillac

P1E20 Cadillac Code - Auxiliary Transmission Fluid Pump Control Module Hybrid/EV Battery Voltage Sense Circuit Low 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: P1E20 Cadillac indicates Auxiliary Transmission Fluid Pump Control Module Hybrid/EV Battery Voltage Sense Circuit Low 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 891

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 P1E20 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 P1E20 Cadillac - Auxiliary Transmission Fluid Pump Control Module Hybrid/EV Battery Voltage Sense Circuit Low Voltage - AutoCodes.com — P1E20 Cadillac Code - Auxiliary Transmission Fluid Pump Control Module Hybrid/EV Battery Voltage Sense Circuit Low Voltage

What does this mean?

What are the Possible Causes of the DTC P1E20 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 P1E20 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 P1E20 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 P1E20 Cadillac Code

1. What are common symptoms of OBDII code P1E20 in a Cadillac related to the Auxiliary Transmission Fluid Pump Control Module Hybrid/EV Battery Voltage Sense Circuit Low Voltage?

- Common symptoms include poor vehicle performance, transmission shifting issues, and the illumination of the check engine light.

2. What are possible causes of the OBDII code P1E20 in a Cadillac indicating low voltage in the Hybrid/EV battery voltage sense circuit?

- Potential causes may include a faulty auxiliary transmission fluid pump control module, a weak hybrid/EV battery, damaged wiring or connectors, or a malfunctioning voltage sensor.

3. How can I diagnose the OBDII code P1E20 in a Cadillac myself?

- You can start by checking for any visible wiring damage, ensuring proper battery connections, and testing the voltage sensor. If you're unable to pinpoint the issue, it's advisable to seek professional help.

4. Is it safe to continue driving my Cadillac with the OBDII code P1E20 present?

- It's not recommended to drive the vehicle with this code active, as it can lead to further damage and potential safety hazards. Address the issue promptly to avoid complications.

5. Can I reset the OBDII code P1E20 in my Cadillac without fixing the underlying problem?

- While you can clear the code temporarily, it will likely reappear if the root cause is not addressed. It's crucial to diagnose and repair the issue to prevent ongoing issues.

6. How much does it typically cost to repair the OBDII code P1E20 in a Cadillac?

- Repair costs can vary depending on the specific cause of the code and the labor rates in your area. It's best to get a professional diagnosis to determine the exact repair expenses.

7. Are there any DIY solutions for fixing the OBDII code P1E20 in a Cadillac?

- Some DIY enthusiasts may attempt to replace damaged wiring or connectors themselves. However, for complex issues like a faulty control module or battery, it's recommended to consult a qualified mechanic.

8. Will the OBDII code P1E20 in a Cadillac affect the hybrid or electric functionality of the vehicle?

- Yes, this code relates to the hybrid/EV system, and if left unresolved, it can impact the performance and efficiency of the hybrid or electric components in the vehicle.

9. How urgent is it to address the OBDII code P1E20 in a Cadillac?

- It's important to address this code promptly to avoid potential damage to the hybrid/EV system and ensure the safe operation of the vehicle. Delaying repairs can lead to more extensive issues.

10. Can extreme weather conditions contribute to triggering the OBDII code P1E20 in a Cadillac?

- Extreme temperatures can sometimes affect the performance of electrical components in the vehicle, potentially leading to issues like low voltage in the Hybrid/EV battery sense circuit.