AutoCodes – Chevrolet – P1A2E Chevrolet

P1A2E Chevrolet 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 Chevrolet 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 1,065

How popular is this code, among other codes? Low

Repair Importance Level

Urgent (Diagnose now) (3 / 3)

Repair Difficulty Level

Advanced (Pro) (3 / 3)

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

What does this mean?

What are the Possible Causes of the DTC P1A2E Chevrolet?

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 Chevrolet?

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 Chevrolet 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 Chevrolet code?

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Need Help with the Code?

Get the P1A2E Chevrolet 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 P1A2E Chevrolet Code

1. What does the OBDII code P1A2E mean for a Chevrolet?

The P1A2E code indicates that the hybrid battery pack's second voltage sensor has detected a very low voltage, which could affect hybrid system performance.

2. What are the common symptoms of the P1A2E code?

Symptoms may include reduced fuel efficiency, warning lights (like the check engine or hybrid system light), limited hybrid functionality, or the vehicle operating in reduced power mode.

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

The code can be caused by a faulty hybrid battery module, a damaged voltage sensor, poor electrical connections, or an internal wiring issue in the hybrid battery pack.

4. Can I drive with the P1A2E code on my Chevrolet?

Driving with this code is not recommended, as it could lead to further damage to the hybrid battery system or limit vehicle performance.

5. How is the P1A2E code diagnosed?

A technician will use a diagnostic scanner to confirm the code, inspect the hybrid battery system, check the voltage readings, and test for wiring or sensor issues.

6. What repairs are needed to fix the P1A2E code?

Repairs may include replacing the hybrid battery module, repairing or replacing faulty wiring, or addressing issues with the voltage sensor.

7. How much does it cost to fix the P1A2E code on a Chevrolet?

Repair costs can vary widely but may range from $500 for wiring repairs to $3,000 or more if the hybrid battery needs replacement.

8. Is the P1A2E code covered under warranty for a Chevrolet?

Hybrid-related repairs may be covered under the vehicleâ€™s hybrid system warranty, which is often longer than the standard warranty. Check with your dealer for specifics.

9. Can low voltage in the hybrid battery damage other components?

Yes, prolonged operation with low voltage can strain the hybrid system and potentially damage other components like the inverter or motor-generator.

10. What maintenance can prevent the P1A2E code from occurring?

Regularly inspect and maintain the hybrid battery system, ensure proper cooling of the battery pack, and address any warning lights promptly to reduce the risk of this code.