AutoCodes – Saturn – P1E21 Saturn

P1E21 Saturn Code - Auxiliary Transmission Fluid Pump Control Module Hybrid/EV Battery Voltage Sense Circuit High 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: P1E21 Saturn indicates Auxiliary Transmission Fluid Pump Control Module Hybrid/EV Battery Voltage Sense Circuit High 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 735

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 P1E21 Saturn 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 P1E21 Saturn - Auxiliary Transmission Fluid Pump Control Module Hybrid/EV Battery Voltage Sense Circuit High Voltage - AutoCodes.com — P1E21 Saturn Code - Auxiliary Transmission Fluid Pump Control Module Hybrid/EV Battery Voltage Sense Circuit High Voltage

What does this mean?

What are the Possible Causes of the DTC P1E21 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 P1E21 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 P1E21 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 P1E21 Saturn Code

1. What are the common symptoms of OBDII code P1E21 in a Saturn vehicle?

The common symptoms of OBDII code P1E21 in a Saturn vehicle may include issues with the auxiliary transmission fluid pump, poor vehicle performance, warning lights on the dashboard, and potential difficulty shifting gears.

2. What could cause the OBDII code P1E21 to appear in a Saturn vehicle?

The OBDII code P1E21 in a Saturn vehicle is typically triggered by a high voltage sense circuit issue related to the auxiliary transmission fluid pump control module in the hybrid/EV battery system.

3. How can I diagnose the OBDII code P1E21 in my Saturn vehicle?

Diagnosing the OBDII code P1E21 in a Saturn vehicle may require using an OBDII scanner to retrieve the specific fault code, inspecting the auxiliary transmission fluid pump control module, checking the hybrid/EV battery voltage sense circuit, and testing related components for proper operation.

4. What are the potential risks of ignoring the OBDII code P1E21 in a Saturn vehicle?

Ignoring the OBDII code P1E21 in a Saturn vehicle can lead to further damage to the auxiliary transmission fluid pump, decreased fuel efficiency, and potential safety hazards due to compromised control module operation.

5. Can I continue driving my Saturn vehicle with the OBDII code P1E21 present?

It is not recommended to continue driving a Saturn vehicle with the OBDII code P1E21 present, as it may indicate a serious issue with the hybrid/EV system that could affect vehicle performance and safety.

6. How can I repair the OBDII code P1E21 in my Saturn vehicle?

Repairing the OBDII code P1E21 in a Saturn vehicle may involve replacing the auxiliary transmission fluid pump control module, repairing or replacing the high voltage sense circuit, and resetting the fault code using an OBDII scanner.

7. Are there any preventive maintenance tips to avoid the OBDII code P1E21 in a Saturn vehicle?

To prevent the OBDII code P1E21 in a Saturn vehicle, it is important to regularly inspect and maintain the auxiliary transmission fluid pump system, perform routine checks on the hybrid/EV battery components, and address any related issues promptly.

8. Can a DIY enthusiast fix the OBDII code P1E21 issue in a Saturn vehicle?

While some DIY enthusiasts may have the skills to diagnose and repair the OBDII code P1E21 in a Saturn vehicle, it is recommended to seek professional help from a qualified mechanic or dealership due to the complexity of hybrid/EV systems.

9. How much does it typically cost to repair the OBDII code P1E21 in a Saturn vehicle?

The cost of repairing the OBDII code P1E21 in a Saturn vehicle can vary depending on the extent of the issue, the parts needed for replacement, and the labor costs involved. It is advisable to obtain quotes from different service providers for an accurate estimate.

10. Is the OBDII code P1E21 a common issue in Saturn vehicles?

The OBDII code P1E21 related to the auxiliary transmission fluid pump control module hybrid/EV battery voltage sense circuit high voltage is not as common as other OBDII codes, but it can still occur in Saturn vehicles equipped with hybrid or electric powertrains.