AutoCodes – GMC – P1A2E GMC

P1A2E GMC Code - Hybrid Battery 2 Voltage Very Low

Quick Answer

Battery voltage sensors allow the Energy Storage Control Module (ESCM) to monitor the voltage of the batteries in the Energy Storage Box (ESB). Common causes include Faulty Energy Storage Box (ESB) Battery, Faulty Battery Energy Control Module (BECM), Battery Energy Control Module (BECM) 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: P1A2E GMC indicates Hybrid Battery 2 Voltage Very Low.
Common causes: Common causes include Faulty Energy Storage Box (ESB) Battery, Faulty Battery Energy Control Module (BECM), Battery Energy Control Module (BECM) 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 955

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 Feb 15, 2020

Description
Possible Causes
How To Fix
Cost to Diagnose
FAQs
Comments
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Code P1A2E GMC Description

Battery voltage sensors allow the Energy Storage Control Module (ESCM) to monitor the voltage of the batteries in the Energy Storage Box (ESB). The batteries apply voltage to internal input resistors that are connected to the signal circuits of the battery voltage sensors. The module provides ground to the battery voltage sensors through the reference circuit. The ESCM monitors the voltage drop across the battery voltage sensors and uses the inputs for hybrid calculations. When the battery voltage is high, the resistances of the sensors are high and the voltage signals are high. When the battery voltage is low, the resistances of the sensors are low and the voltage signals are low.

OBDII Code P1A2E GMC - Hybrid Battery 2 Voltage Very Low - AutoCodes.com — P1A2E GMC Code - Hybrid Battery 2 Voltage Very Low

What does this mean?

What are the Possible Causes of the DTC P1A2E GMC?

Faulty Energy Storage Box (ESB) Battery
Faulty Battery Energy Control Module (BECM)
Battery Energy Control Module (BECM) harness is open or shorted
Battery Energy Control Module (BECM) circuit poor electrical connection

How to Fix the DTC P1A2E 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 P1A2E 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 P1A2E GMC code?

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Need Help with the 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 P1A2E GMC Code

1. What are the common symptoms of OBDII code P1A2E GMC (Hybrid Battery 2 Voltage Very Low)?

Symptoms may include poor hybrid system performance, reduced fuel efficiency, warning lights on the dashboard, and difficulty starting the vehicle.

2. What are the possible causes of OBDII code P1A2E GMC (Hybrid Battery 2 Voltage Very Low)?

Potential causes include a faulty hybrid battery cell, battery management system issues, charging system problems, wiring issues, or a malfunctioning hybrid control module.

3. How can I diagnose the root cause of OBDII code P1A2E GMC (Hybrid Battery 2 Voltage Very Low)?

Diagnosis often involves using a professional OBDII scanner to retrieve the code, inspecting the hybrid battery and related components for physical damage, and checking the charging system and wiring for any issues.

4. Is it safe to continue driving with OBDII code P1A2E GMC (Hybrid Battery 2 Voltage Very Low) present?

It is not recommended to drive the vehicle with this code active, as it can lead to further damage to the hybrid system components and potential safety hazards.

5. How can I repair OBDII code P1A2E GMC (Hybrid Battery 2 Voltage Very Low)?

Repair options may include replacing the faulty hybrid battery cell, repairing wiring or connection issues, resetting the battery management system, or recalibrating the hybrid control module.

6. Can I reset OBDII code P1A2E GMC (Hybrid Battery 2 Voltage Very Low) using a basic OBDII scanner?

Resetting the code may temporarily clear the warning light, but it is important to address the underlying issue causing the code to prevent it from reoccurring.

7. How much does it typically cost to repair OBDII code P1A2E GMC (Hybrid Battery 2 Voltage Very Low)?

Repair costs can vary depending on the specific issue causing the code, the extent of the repairs needed, and the labor rates of the repair shop. It is recommended to obtain multiple quotes for an accurate estimate.

8. Can a DIY enthusiast repair OBDII code P1A2E GMC (Hybrid Battery 2 Voltage Very Low)?

While some simple repairs like checking connections or resetting the system may be possible for DIY enthusiasts, more complex repairs involving the hybrid battery or control modules may require professional expertise.

9. How often does OBDII code P1A2E GMC (Hybrid Battery 2 Voltage Very Low) occur in GMC vehicles?

This code is relatively uncommon, but it can occur in GMC hybrid vehicles with issues related to the hybrid battery system.

10. Are there any preventive maintenance tips to avoid OBDII code P1A2E GMC (Hybrid Battery 2 Voltage Very Low)?

Regularly inspecting the hybrid battery system, following the manufacturer's maintenance schedule, and addressing any warning signs promptly can help prevent issues leading to this OBDII code.