AutoCodes – Generic – P1E4A

P1E4A Code - Control Module Redundant Drive Motor 1 Speed Sensing Circuit

Quick Answer

The drive motor generator position sensor is monitored by the motor 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: P1E4A indicates Control Module Redundant Drive Motor 1 Speed Sensing Circuit.
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 3,108

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 P1E4A Description

The drive motor generator position sensor is monitored by the motor control module. The motor control module monitors the angular position, speed and direction of the drive motor generator based upon the signals of the resolver-type position sensor. The position sensor allows the motor control module to determine the exact position, speed and direction of the drive motor generator. The hybrid powertrain control module also calculates motor speed. This fault is handled inside the power inverter module, often referred to as the drive motor generator power inverter module, and no external circuits are involved.

OBDII Code P1E4A - Control Module Redundant Drive Motor 1 Speed Sensing Circuit - AutoCodes.com — P1E4A Code - Control Module Redundant Drive Motor 1 Speed Sensing Circuit

What does this mean?

What are the Possible Causes of the DTC P1E4A?

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 P1E4A?

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 P1E4A 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 P1E4A code?

Need more information on how to fix the P1E4A code? Get Access to Factory Service Manuals

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Get the P1E4A code diagnosed by a professional: Find a repair shop in your area

Information for Specific Makes

P1E4A Acura — Slave Cylinder Drive Motor Current Malfunction Over Current
P1E4A Buick — Control Module Redundant Drive Motor 1 Speed Sensing Circuit
P1E4A Cadillac — Control Module Redundant Drive Motor 1 Speed Sensing Circuit
P1E4A Chevrolet — Control Module Redundant Drive Motor 1 Speed Sensing Circuit
P1E4A GMC — Control Module Redundant Drive Motor 1 Speed Sensing Circuit
P1E4A Honda — Slave Cylinder Drive Motor Current Malfunction Over Current
P1E4A Saturn — Control Module Redundant Drive Motor 1 Speed Sensing Circuit

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 P1E4A Code

1. What are the common symptoms of OBDII code P1E4A?

- Common symptoms include loss of power, poor acceleration, and an illuminated check engine light.

2. What causes the OBDII code P1E4A to trigger?

- The code P1E4A is triggered when the control module detects an issue with the speed sensing circuit of drive motor 1 in a redundant drive system.

3. How serious is the OBDII code P1E4A?

- The severity of this code can vary. While it may not always result in immediate vehicle breakdown, it can lead to performance issues and should be addressed promptly.

4. Can I continue driving with the OBDII code P1E4A present?

- It is not recommended to continue driving with this code present, as it can affect the performance and safety of your vehicle.

5. What should I check first when diagnosing OBDII code P1E4A?

- Start by checking the wiring and connections related to the speed sensing circuit of drive motor 1, as poor connections or damaged wires can often be the culprit.

6. How can I repair OBDII code P1E4A?

- Repairing this code typically involves fixing any issues with the speed sensing circuit, such as repairing or replacing damaged wires, connectors, or the drive motor itself.

7. Is it possible to reset OBDII code P1E4A without repairs?

- While clearing the code may temporarily turn off the check engine light, it is crucial to address the underlying issue to prevent future problems.

8. Can weather conditions affect the triggering of OBDII code P1E4A?

- Extreme weather conditions, such as excessive heat or moisture, can sometimes impact the operation of the speed sensing circuit and trigger this code.

9. Are there any preventive measures to avoid OBDII code P1E4A?

- Regular maintenance checks, including inspecting the wiring and connections of the drive motor system, can help prevent issues that lead to the triggering of this code.

10. Should I seek professional help for OBDII code P1E4A?

- If you are unsure about diagnosing or repairing this code yourself, it is recommended to seek help from a qualified mechanic to ensure the issue is properly addressed.