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Engine-Codes – Generic – P1E1A

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

Quick Answer

The diagnostic trouble code P1E1A indicates that the Auxiliary Transmission Fluid Pump Control Module is detecting a high voltage in the system. Common causes include Faulty Auxiliary Transmission Fluid Pump Control Module, Short circuit in the wiring connected to the control module, Malfunctioning auxiliary transmission fluid pump. 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 Auxiliary Transmission Fluid Pump Control Module, Short circuit in the wiring connected to the control module, Malfunctioning auxiliary transmission fluid pump.
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 14, 2024
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Code P1E1A Description

The diagnostic trouble code P1E1A indicates that the Auxiliary Transmission Fluid Pump Control Module is detecting a high voltage in the system. This module is responsible for controlling the operation of the auxiliary transmission fluid pump, which helps to maintain proper fluid pressure in the transmission system. When the voltage in the system is too high, it can lead to various issues that can affect the vehicle's performance and overall functionality.

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

Common Causes of P1E1A

  1. Faulty Auxiliary Transmission Fluid Pump Control Module.
  2. Short circuit in the wiring connected to the control module.
  3. Malfunctioning auxiliary transmission fluid pump.
  4. Issues with the vehicle's electrical system, such as a faulty battery or alternator.
  5. Corrosion or damage to the electrical connectors in the transmission system.

Symptoms of P1E1A

  1. Erratic shifting or delayed engagement when shifting gears.
  2. Transmission slipping or jerking during acceleration.
  3. Overheating of the transmission fluid.
  4. Illumination of the Check Engine Light or Transmission Warning Light.
  5. Reduced fuel efficiency due to increased load on the transmission system.

How to Fix P1E1A

  1. Begin by conducting a thorough inspection of the auxiliary transmission fluid pump control module, wiring, and pump to identify any visible signs of damage or malfunction.
  2. Use a multimeter to test the voltage levels in the system and pinpoint the source of the high voltage.
  3. Replace the faulty control module, pump, or wiring as needed.
  4. Clear the diagnostic trouble codes from the vehicle's computer system and reset the transmission adaptations.
  5. Test drive the vehicle to ensure that the transmission is operating smoothly and that the issue has been resolved.

Cost to Fix P1E1A

The cost of repairing the Auxiliary Transmission Fluid Pump Control Module System Voltage High issue can vary depending on the specific cause of the problem and the extent of the repairs needed. In general, the cost of parts for this repair can range from $200 to $600, while labor costs can range from $150 to $300. Overall, the total repair cost can be expected to fall between $350 and $900. It is important to note that these are rough estimates, and actual costs may vary based on the vehicle's make and model, the location of the repair shop, and any additional services required. It is recommended to consult with a qualified mechanic to get a more accurate cost estimate for your specific situation.

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Code P1E1A 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.

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