AutoCodes – Buick – P1A2E Buick

P1A2E Buick 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 Buick 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 898

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

What does this mean?

What are the Possible Causes of the DTC P1A2E Buick?

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 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 P1A2E 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 P1A2E Buick 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 Buick Code

1. What does the OBDII code P1A2E mean on a Buick?

The P1A2E code indicates that the voltage of Hybrid Battery 2 is very low, which can affect the performance of the hybrid system.

2. What are the common symptoms of the P1A2E code in a Buick?

Symptoms may include reduced fuel efficiency, warning lights on the dashboard, limited hybrid system performance, or the vehicle operating solely on the gas engine.

3. What causes the P1A2E code to appear in a Buick?

Common causes include a faulty hybrid battery module, damaged wiring, corrosion in battery connectors, or issues with the battery management system.

4. Can I continue driving my Buick with the P1A2E code?

While the vehicle may still run, driving with this code can lead to reduced performance and potential damage to the hybrid system. Itâ€™s best to address it promptly.

5. How is the P1A2E code diagnosed in a Buick?

A technician will use a diagnostic scanner to confirm the code, check battery voltage levels, inspect the wiring and connectors, and analyze the hybrid battery control module.

6. How do you fix the P1A2E code on a Buick?

Repairs may include replacing the affected hybrid battery module, repairing damaged wiring or connectors, or updating/reprogramming the battery control module.

7. How much does it cost to repair the P1A2E code on a Buick?

Costs vary depending on the exact issue, but hybrid battery repairs or replacements can range from a few hundred to several thousand dollars.

8. Can a low 12V battery cause the P1A2E code on a Buick?

No, this code specifically relates to the hybrid battery system, not the standard 12V battery.

9. Is the P1A2E code covered under warranty for a Buick?

Hybrid battery-related issues may be covered under the hybrid system warranty, which is typically longer than the standard warranty. Check with your dealer for specifics.

10. Can the P1A2E code clear itself on a Buick?

The code is unlikely to clear itself without addressing the underlying issue, as it indicates a persistent problem with the hybrid battery system.