AutoCodes – Buick – P1A0C Buick

P1A0C Buick Code - Battery Energy Control Module System Voltage Low Voltage

Quick Answer

The vehicle control modules or sensors monitor the system voltage to verify the system voltage is within the normal operating range. Common causes include Faulty Battery Energy Control Module, Battery Energy Control Module harness is open or shorted, Battery Energy Control Module circuit poor electrical connection. 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: P1A0C Buick indicates Battery Energy Control Module System Voltage Low Voltage.
Common causes: Common causes include Faulty Battery Energy Control Module, Battery Energy Control Module harness is open or shorted, Battery Energy Control Module circuit poor electrical connection.
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 1,019

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 25, 2020

Description
Possible Causes
How To Fix
Cost to Diagnose
FAQs
Comments
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Code P1A0C Buick Description

The vehicle control modules or sensors monitor the system voltage to verify the system voltage is within the normal operating range. The Powertrain Control Module (PCM) sets the OBDII code when the Battery Energy Control Module is not to factory specifications.

OBDII Code P1A0C Buick - Battery Energy Control Module System Voltage Low Voltage - AutoCodes.com — P1A0C Buick Code - Battery Energy Control Module System Voltage Low Voltage

What does this mean?

What are the Possible Causes of the DTC P1A0C Buick?

Faulty Battery Energy Control Module
Battery Energy Control Module harness is open or shorted
Battery Energy Control Module circuit poor electrical connection

How to Fix the DTC P1A0C Buick?

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 P1A0C Buick 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 P1A0C Buick code?

Need more information on how to fix the P1A0C Buick code? Get Access to Factory Service Manuals

Need Help with the Code?

Get the P1A0C Buick code diagnosed by a professional: Find a repair shop in your area

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 P1A0C Buick Code

1. What does the OBDII code P1A0C mean on a Buick?

P1A0C indicates that the Battery Energy Control Module has detected a low system voltage, which can affect the performance of the hybrid or electrical system.

2. What are the common symptoms of code P1A0C on a Buick?

Symptoms may include a check engine light, reduced fuel efficiency, limited electric motor operation, or the vehicle entering a limp mode.

3. What causes the P1A0C code to appear on a Buick?

Common causes include a failing Battery Energy Control Module, low voltage in the hybrid battery pack, loose or corroded battery connections, or a malfunctioning voltage sensor.

4. Can driving with the P1A0C code damage my Buick?

Yes, driving with this code can lead to further damage to the hybrid battery system or other electrical components if the low voltage issue is not addressed.

5. How is the P1A0C code diagnosed on a Buick?

A mechanic will typically use a scan tool to read the code, inspect the battery and electrical connections, test the voltage levels, and verify the functionality of the Battery Energy Control Module.

6. How do you fix the P1A0C code on a Buick?

Repairs may include charging or replacing the hybrid battery, cleaning or tightening battery terminals, replacing the Battery Energy Control Module, or repairing damaged wiring.

7. Can a weak 12V battery trigger the P1A0C code on a Buick?

While the code usually relates to the hybrid battery system, a weak or failing 12V battery can sometimes contribute to voltage issues that may trigger this code.

8. How much does it cost to repair the P1A0C code on a Buick?

Repair costs can vary widely, from $100 for minor fixes like cleaning connections to over $1,000 if the hybrid battery or control module needs replacement.

9. Is the P1A0C code specific to hybrid Buick models?

Yes, the P1A0C code is typically associated with Buick hybrid or electric vehicles that use a Battery Energy Control Module.

10. Can I reset the P1A0C code without fixing the issue?

You can clear the code with a scan tool, but it will likely return unless the underlying issue is resolved. Ignoring the problem can lead to further complications.