AutoCodes – GMC – P1A2D GMC

P1A2D GMC Code - Hybrid Battery 2 Voltage 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: P1A2D GMC indicates Hybrid Battery 2 Voltage 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 784

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 P1A2D 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 P1A2D GMC - Hybrid Battery 2 Voltage Low - AutoCodes.com — P1A2D GMC Code - Hybrid Battery 2 Voltage Low

What does this mean?

What are the Possible Causes of the DTC P1A2D 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 P1A2D 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 P1A2D 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 P1A2D 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 P1A2D GMC Code

1. What are the common symptoms of OBDII code P1A2D GMC (Hybrid Battery 2 Voltage Low)?

- The common symptoms include reduced hybrid system performance, decreased fuel efficiency, and potentially a warning light on the dashboard.

2. What are the possible causes of OBDII code P1A2D GMC (Hybrid Battery 2 Voltage Low)?

- The code could be triggered by a faulty hybrid battery cell, issues with the battery cooling system, or problems with the battery management system.

3. How serious is OBDII code P1A2D GMC (Hybrid Battery 2 Voltage Low)?

- This code indicates a potential problem with the hybrid battery, which is a crucial component of the vehicle's hybrid system. It should be addressed promptly to prevent further issues.

4. Can I continue driving with OBDII code P1A2D GMC (Hybrid Battery 2 Voltage Low) present?

- It is not recommended to continue driving with this code active, as it can lead to further damage to the hybrid system and potentially leave you stranded.

5. How can I diagnose OBDII code P1A2D GMC (Hybrid Battery 2 Voltage Low) at home?

- While a professional diagnosis is recommended, you can start by checking the hybrid battery connections, inspecting for any visible damage, and ensuring the cooling system is functioning properly.

6. What are some repair tips for fixing OBDII code P1A2D GMC (Hybrid Battery 2 Voltage Low)?

- Repair tips may include testing and potentially replacing faulty battery cells, checking and repairing any cooling system leaks, and resetting the battery management system.

7. Do I need special tools to repair OBDII code P1A2D GMC (Hybrid Battery 2 Voltage Low)?

- Repairing this code may require specialized tools for diagnosing the hybrid system, such as a hybrid battery tester or a scan tool capable of reading hybrid system codes.

8. Can a DIY enthusiast fix OBDII code P1A2D GMC (Hybrid Battery 2 Voltage Low) themselves?

- While some basic troubleshooting steps can be performed by a knowledgeable DIY enthusiast, diagnosing and repairing hybrid system issues often requires professional expertise due to the complexity of the system.

9. How much does it cost to repair OBDII code P1A2D GMC (Hybrid Battery 2 Voltage Low)?

- The cost of repair can vary depending on the exact cause of the code, the extent of the damage, and whether any components need to be replaced. It is recommended to obtain a diagnosis from a professional for an accurate estimate.

10. How often does OBDII code P1A2D GMC (Hybrid Battery 2 Voltage Low) occur in GMC vehicles?

- This particular code can occur in GMC hybrid vehicles equipped with a hybrid battery system, and its frequency may vary depending on the vehicle's age and maintenance history.