Engine-Codes.com
Engine-Codes – Generic – P1E20

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

Quick Answer

The diagnostic trouble code P1E20 indicates a problem with the Auxiliary Transmission Fluid Pump Control Module Hybrid/EV Battery Voltage Sense Circuit experiencing low voltage. Common causes include Faulty battery voltage sense circuit, Low battery voltage or weak battery, Wiring issues or loose connections in the circuit. 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 indicates Auxiliary Transmission Fluid Pump Control Module Hybrid/EV Battery Voltage Sense Circuit Low Voltage.
Common causes
Common causes include Faulty battery voltage sense circuit, Low battery voltage or weak battery, Wiring issues or loose connections in the circuit.
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.
What is this?
Table of contents Created and updated by William Orellana on Sep 10, 2024
💬 Need more help? Ask Auto Expert for instant answers — it's free!
AutoCodes App

Fix Your Car Smarter

Try the New AutoCodes App!

Get complete OBDII diagnostics, repair solutions, and cost estimates, plus AI chat support on demand.

AutoCodes App on Google Play

Code P1E20 Description

The diagnostic trouble code P1E20 indicates a problem with the Auxiliary Transmission Fluid Pump Control Module Hybrid/EV Battery Voltage Sense Circuit experiencing low voltage. In hybrid and electric vehicles, the Auxiliary Transmission Fluid Pump Control Module plays a crucial role in managing the transmission fluid pump, which helps regulate the temperature of the transmission system. The battery voltage sense circuit is responsible for monitoring the voltage levels of the hybrid or electric vehicle's battery pack to ensure proper functioning.

OBDII Code P1E20 - Auxiliary Transmission Fluid Pump Control Module Hybrid/EV Battery Voltage Sense Circuit Low Voltage
P1E20 Code - Auxiliary Transmission Fluid Pump Control Module Hybrid/EV Battery Voltage Sense Circuit Low Voltage

Common Causes of P1E20

  1. Faulty battery voltage sense circuit.
  2. Low battery voltage or weak battery.
  3. Wiring issues or loose connections in the circuit.
  4. Malfunctioning Auxiliary Transmission Fluid Pump Control Module.
  5. Software or programming issues in the control module.

Symptoms of P1E20

  1. Illumination of the check engine light on the dashboard.
  2. Transmission slipping or delayed shifting.
  3. Decreased fuel efficiency.
  4. Unusual noises coming from the transmission system.
  5. Vehicle entering limp mode, limiting performance.

How to Fix P1E20

  1. Perform a thorough inspection of the battery voltage sense circuit and the battery itself to ensure proper voltage levels.
  2. Check for any loose connections or damaged wiring in the circuit and repair or replace as necessary.
  3. Test the Auxiliary Transmission Fluid Pump Control Module for functionality and replace if found to be faulty.
  4. Clear the diagnostic trouble code from the vehicle's system using a diagnostic tool.
  5. Test drive the vehicle to ensure that the transmission system is functioning correctly after the repair.

Cost to Fix P1E20

The cost of repairing a P1E20 code can vary depending on the specific cause of the issue and the parts required for the repair. On average, the cost of parts for this repair can range from $200 to $500, including the cost of a new control module or any wiring components. Labor costs can also vary, with hourly rates typically ranging from $80 to $150 per hour. Therefore, the total repair cost for addressing a P1E20 code can range from $300 to $800 or more, depending on the extent of the issue and the labor rates in your area. It is recommended to consult with a professional mechanic to get an accurate estimate for your specific vehicle.

Need more information about the P1E20 code?

Need more information on how to fix the P1E20 code? Get Access to Factory Service Manuals

Need Help with the Code?

Get the P1E20 code diagnosed by a professional: Find a repair shop in your area

Code P1E20 Information for Specific Makes

  • P1E20 Buick — Auxiliary Transmission Fluid Pump Control Module Hybrid/EV Battery Voltage Sense Circuit Low Voltage
  • P1E20 Cadillac — Auxiliary Transmission Fluid Pump Control Module Hybrid/EV Battery Voltage Sense Circuit Low Voltage
  • P1E20 Chevrolet — Auxiliary Transmission Fluid Pump Control Module Hybrid/EV Battery Voltage Sense Circuit Low Voltage
  • P1E20 GMC — Auxiliary Transmission Fluid Pump Control Module Hybrid/EV Battery Voltage Sense Circuit Low Voltage
  • P1E20 Saturn — Auxiliary Transmission Fluid Pump Control Module Hybrid/EV Battery Voltage Sense Circuit Low Voltage
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 Code

1. What does the OBDII code P1E20 mean?

P1E20 indicates a low voltage issue in the Auxiliary Transmission Fluid Pump Control Module's Hybrid/EV Battery Voltage Sense Circuit.

2. What are the common symptoms of code P1E20?

Symptoms may include warning lights on the dashboard, reduced hybrid or EV performance, and abnormal transmission behavior.

3. What causes code P1E20 to appear?

Common causes include a faulty auxiliary transmission fluid pump control module, damaged wiring, corroded connectors, or a low voltage condition in the hybrid/EV battery.

4. Can I drive my vehicle with a P1E20 code?

Driving with this code is not recommended, as it can lead to reduced performance and potential damage to the transmission or hybrid/EV system.

5. How is the P1E20 code diagnosed?

Diagnosis involves using a scan tool to confirm the code, inspecting the wiring and connectors for damage or corrosion, and testing the voltage of the hybrid/EV battery.

6. How do I fix the P1E20 code?

Repairs may include replacing the auxiliary transmission fluid pump control module, repairing damaged wiring, or addressing issues with the hybrid/EV battery.

7. What tools are needed to troubleshoot a P1E20 code?

A diagnostic scan tool, multimeter, and access to the vehicle’s wiring diagrams are typically required for troubleshooting.

8. What is the role of the auxiliary transmission fluid pump control module?

This module ensures proper transmission fluid flow, which is critical for efficient operation in hybrid and EV systems.

9. Can a low hybrid/EV battery cause the P1E20 code?

Yes, a low or malfunctioning hybrid/EV battery can contribute to triggering this code.

10. Is P1E20 a manufacturer-specific code?

Yes, P1E20 is a manufacturer-specific code, and its meaning may vary slightly depending on the vehicle make and model.

Discuss the causes and fixes for P1E20 OBDII Code

Submit a New Comment

Code P1E20 comments

No comments found for this page.