AutoCodes – GMC – P1A2F GMC

P1A2F GMC Code - Hybrid Battery 2 Voltage High

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: P1A2F GMC indicates Hybrid Battery 2 Voltage High.
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.

Save to My Repairs My Repairs

AI answers can be wrong. Verify repairs with testing. Open full chat

Code Popularity 859

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
Add Comment

💬 Need more help? Ask Coddy for instant answers — it's free!

Code P1A2F 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 P1A2F GMC - Hybrid Battery 2 Voltage High - AutoCodes.com — P1A2F GMC Code - Hybrid Battery 2 Voltage High

What does this mean?

What are the Possible Causes of the DTC P1A2F 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 P1A2F 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 P1A2F 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 P1A2F GMC code?

Need more information on how to fix the P1A2F GMC code? Get Access to Factory Service Manuals

Need Help with the Code?

Get the P1A2F GMC 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 P1A2F GMC Code

1. What are the common symptoms of OBDII code P1A2F GMC (Hybrid Battery 2 Voltage High)?

A: Common symptoms include reduced fuel efficiency, the hybrid system not engaging properly, and potential illumination of the check engine light.

2. What are the possible causes of OBDII code P1A2F GMC (Hybrid Battery 2 Voltage High)?

A: The code may be triggered by issues such as a faulty hybrid battery cell, a malfunctioning battery management system, or wiring problems related to the hybrid battery.

3. How serious is the OBDII code P1A2F GMC (Hybrid Battery 2 Voltage High)?

A: This code should be addressed promptly as it can affect the performance and efficiency of the hybrid system. Ignoring it may lead to further damage and higher repair costs.

4. Can I continue driving with the OBDII code P1A2F GMC (Hybrid Battery 2 Voltage High) present?

A: It is not recommended to continue driving with this code active, as it can result in decreased fuel efficiency and potential damage to the hybrid system components.

5. How can I diagnose the underlying issue causing OBDII code P1A2F GMC (Hybrid Battery 2 Voltage High)?

A: Proper diagnosis typically involves using a diagnostic scanner to read the code, testing the hybrid battery cells, inspecting the battery management system, and checking for any wiring faults.

6. What are some repair tips for addressing OBDII code P1A2F GMC (Hybrid Battery 2 Voltage High)?

A: Repair tips may include replacing faulty hybrid battery cells, reprogramming the battery management system, ensuring proper electrical connections, and clearing the code for further monitoring.

7. Is it possible to reset OBDII code P1A2F GMC (Hybrid Battery 2 Voltage High) without fixing the underlying issue?

A: While you can clear the code temporarily, it is crucial to address the root cause to prevent the code from reoccurring and potentially causing more significant issues.

8. How much does it typically cost to repair OBDII code P1A2F GMC (Hybrid Battery 2 Voltage High)?

A: The cost of repairs can vary depending on the exact cause of the code, but it may range from a few hundred to a few thousand dollars, especially if hybrid battery components need replacement.

9. Can a DIY enthusiast fix OBDII code P1A2F GMC (Hybrid Battery 2 Voltage High)?

A: While some simple checks and repairs may be possible for DIY enthusiasts, diagnosing and fixing complex hybrid system issues related to this code may require professional expertise and specialized tools.

10. How often does OBDII code P1A2F GMC (Hybrid Battery 2 Voltage High) occur in GMC vehicles?

A: This code is relatively rare but can occur in GMC hybrid vehicles experiencing issues with the hybrid battery system. Regular maintenance and proper care can help prevent its occurrence.