AutoCodes – Saturn – P1E1C Saturn

P1E1C Saturn Code - Auxiliary Transmission Fluid Pump Control Module Hybrid Battery Voltage Isolation Sensor Circuit 1 Low Voltage

Quick Answer

The power inverter module, also called 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: P1E1C Saturn indicates Auxiliary Transmission Fluid Pump Control Module Hybrid Battery Voltage Isolation Sensor Circuit 1 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 926

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 P1E1C Saturn Description

The power inverter module, also called 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. The motor control modules and the hybrid powertrain control module are part of the power inverter module and are not serviced separately.
Each motor control module measures hybrid battery high voltage with several internal sensors. The motor control modules test for loss of isolation between either the high-voltage positive circuit or high-voltage negative circuit and vehicle chassis. The motor control modules test for isolation when the high-voltage contactor relays are closed. The hybrid powertrain control module 2 only tests the hybrid battery assembly for high-voltage loss of isolation when the high-voltage contactor relays are open.
Motor control module loss of isolation is detected through the use of two high-impedance resistors and voltage measuring circuitry. The two resistors are connected in series between the high- voltage positive and high-voltage negative circuits. The centre connection of the two resistors is also connected to vehicle chassis. The motor control module then measures the voltage drop across one of the resistors. Without a loss of isolation, the motor control module should measure about half of the high voltage potential. This is referred to as mid-pack voltage. The mid-pack voltage value is then doubled by the software and displayed on a scan tool as Motor 1 Isolation Voltage, Motor 2 Isolation Voltage or Auxiliary Transmission Fluid Pump Isolation Voltage. When a loss of isolation is present, the motor isolation voltage display will indicate voltage that is more or less than actual hybrid battery high voltage. The motor control module monitors the loss of isolation voltage measuring circuitry for correct operation.

OBDII Code P1E1C Saturn - Auxiliary Transmission Fluid Pump Control Module Hybrid Battery Voltage Isolation Sensor Circuit 1 Low Voltage - AutoCodes.com — P1E1C Saturn Code - Auxiliary Transmission Fluid Pump Control Module Hybrid Battery Voltage Isolation Sensor Circuit 1 Low Voltage

What does this mean?

What are the Possible Causes of the DTC P1E1C Saturn?

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 P1E1C Saturn?

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 P1E1C Saturn 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 P1E1C Saturn Code

1. What are the common symptoms of OBDII code P1E1C in a Saturn related to the Auxiliary Transmission Fluid Pump Control Module Hybrid Battery Voltage Isolation Sensor Circuit 1 Low Voltage issue?

The common symptoms may include poor fuel economy, rough shifting, lack of power, and the illumination of the check engine light.

2. What are some possible causes of OBDII code P1E1C in a Saturn?

Possible causes may include a faulty auxiliary transmission fluid pump control module, issues with the hybrid battery voltage isolation sensor circuit, low voltage in the system, or wiring/connectivity issues.

3. How can I diagnose the OBDII code P1E1C in my Saturn?

Diagnosing this code typically involves using a diagnostic scanner to read the code, checking the system's voltage levels, inspecting the wiring and connectors, and testing the auxiliary transmission fluid pump control module and related components.

4. Can I continue driving my Saturn with OBDII code P1E1C present?

It is not recommended to continue driving your Saturn with this code present, as it can lead to further damage to the transmission system or other components. It's best to address the issue promptly.

5. How can I repair OBDII code P1E1C in my Saturn?

Repairing this code may involve replacing the faulty auxiliary transmission fluid pump control module, addressing any issues with the hybrid battery voltage isolation sensor circuit, fixing wiring problems, and clearing the code from the system.

6. Are there any DIY tips for addressing OBDII code P1E1C in a Saturn?

While some basic checks like inspecting the wiring and connectors can be done by DIY enthusiasts, diagnosing and repairing this complex issue may require professional help to ensure proper resolution.

7. How much does it cost to fix OBDII code P1E1C in a Saturn?

The cost of fixing this code can vary depending on the exact cause of the issue, parts needed for replacement, labor costs, and whether you choose to address the problem at a dealership or an independent mechanic.

8. Can a low battery voltage cause OBDII code P1E1C to appear in a Saturn?

Yes, low battery voltage can be one of the causes triggering this code in a Saturn, as it may disrupt the proper functioning of the auxiliary transmission fluid pump control module and related components.

9. Is the OBDII code P1E1C specific to Saturn vehicles only?

While this specific code may be more common in Saturn vehicles, similar issues related to low voltage in the auxiliary transmission fluid pump control module or hybrid battery system can occur in other hybrid or electric vehicles as well.

10. How urgent is it to address OBDII code P1E1C in a Saturn?

It is advisable to address this code promptly to prevent potential damage to the transmission system or other components, and to ensure the proper functioning and efficiency of your Saturn vehicle.