AutoCodes – GMC – P1EA9 GMC

P1EA9 GMC Code - 14 V Power Module System Low Voltage

Quick Answer

The 14 V power module, also called the accessory DC power control module, monitors its 14 volt circuit when it is enabled. Common causes include Program 14 V Power Module, Faulty 14 V Power Module, 14 V Power 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: P1EA9 GMC indicates 14 V Power Module System Low Voltage.
Common causes: Common causes include Program 14 V Power Module, Faulty 14 V Power Module, 14 V Power 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 985

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 24, 2020

Description
Possible Causes
How To Fix
Cost to Diagnose
FAQs
Comments
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Code P1EA9 GMC Description

The 14 V power module, also called the accessory DC power control module, monitors its 14 volt circuit when it is enabled. This DTC sets when the 14 volt circuit in the 14 V power module is below this minimum level at the time it is enabled. 14V power module module functions will run only when an APM enable message from the hybrid powertrain control module is active on the serial data circuit.

OBDII Code P1EA9 GMC - 14 V Power Module System Low Voltage - AutoCodes.com — P1EA9 GMC Code - 14 V Power Module System Low Voltage

What does this mean?

What are the Possible Causes of the DTC P1EA9 GMC?

Program 14 V Power Module
Faulty 14 V Power Module
14 V Power Module harness is open or shorted
14 V Power Module circuit poor electrical connection

How to Fix the DTC P1EA9 GMC?

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 P1EA9 GMC 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 P1EA9 GMC code?

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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 P1EA9 GMC Code

1. What are the common symptoms of OBDII code P1EA9 in a GMC vehicle?

- Common symptoms include dim or flickering lights, intermittent electrical issues, and a weak or dead battery.

2. What does the OBDII code P1EA9 indicating "14 V Power Module System Low Voltage" mean in a GMC vehicle?

- The code indicates that the vehicle's power module system is experiencing low voltage, affecting various electrical components.

3. What are the possible causes of OBDII code P1EA9 in a GMC vehicle?

- The code can be triggered by a faulty power module, a weak battery, poor electrical connections, or a malfunctioning alternator.

4. How can I diagnose the root cause of OBDII code P1EA9 in my GMC vehicle?

- Diagnose the system using a multimeter to check the voltage levels at the power module, battery, and alternator. Inspect for any loose connections or damaged wiring.

5. Can I still drive my GMC vehicle with the OBDII code P1EA9 present?

- It is not recommended to drive the vehicle with this code active, as it can lead to further electrical issues and potential breakdowns.

6. How can I repair OBDII code P1EA9 in my GMC vehicle?

- Repair options include replacing the faulty power module, charging or replacing the battery, fixing any loose connections, or addressing alternator issues.

7. Is it safe to reset the OBDII code P1EA9 in my GMC vehicle using a diagnostic tool?

- While you can reset the code temporarily, it is crucial to address the underlying issue causing the low voltage condition to prevent further damage.

8. How much does it typically cost to repair OBDII code P1EA9 in a GMC vehicle?

- The cost of repair can vary depending on the specific issue, but it may range from $100 to $500 or more, including parts and labor.

9. Will OBDII code P1EA9 cause my GMC vehicle to fail an emissions test?

- Yes, if the code is not addressed and the vehicle's electrical system is not functioning properly, it can lead to emissions-related failures.

10. Can a DIY enthusiast with basic automotive knowledge fix OBDII code P1EA9 in a GMC vehicle?

- Depending on the exact cause, some DIY repairs like checking and tightening connections may be feasible, but more complex issues may require professional assistance.