AutoCodes – Cadillac – P1A2E Cadillac

P1A2E Cadillac 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 Cadillac 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 903

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

What does this mean?

What are the Possible Causes of the DTC P1A2E Cadillac?

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 Cadillac?

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 Cadillac 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 Cadillac 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 Cadillac Code

1. What are the common symptoms of OBDII code P1A2E in a Cadillac Hybrid indicating Hybrid Battery 2 Voltage Very Low?

The common symptoms include decreased fuel efficiency, reduced power, and potential issues with starting the vehicle.

2. What are the possible causes of OBDII code P1A2E in a Cadillac Hybrid?

Possible causes include a faulty hybrid battery 2 module, poor battery connections, or a malfunctioning battery cooling system.

3. How can I diagnose the OBDII code P1A2E indicating Hybrid Battery 2 Voltage Very Low in my Cadillac Hybrid?

Diagnosis involves using a scan tool to read the code, checking the hybrid battery voltage, inspecting battery connections, and testing the battery cooling system.

4. Can I continue driving my Cadillac Hybrid with the OBDII code P1A2E present?

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

5. How can I repair OBDII code P1A2E in a Cadillac Hybrid myself?

DIY repair tips include checking and cleaning battery connections, inspecting the battery module for damage, and ensuring proper cooling system function. However, it is advisable to seek professional help for accurate diagnosis and repair.

6. Is it safe to reset the OBDII code P1A2E in my Cadillac Hybrid using a scan tool?

Resetting the code may temporarily clear the warning light, but it is crucial to address the underlying issue causing the code to prevent potential damage to the hybrid system.

7. What should I do if I suspect my Cadillac Hybrid's hybrid battery 2 voltage is very low but the OBDII code P1A2E has not appeared?

If you notice symptoms of low voltage in the hybrid battery but the code has not shown up, it is best to have the vehicle inspected by a professional to prevent any potential issues.

8. How often should I check the hybrid battery voltage in my Cadillac Hybrid to prevent OBDII code P1A2E from appearing?

Regularly monitoring the hybrid battery voltage during routine maintenance checks can help prevent issues like OBDII code P1A2E from occurring unexpectedly.

9. Can extreme weather conditions affect the hybrid battery 2 voltage in a Cadillac Hybrid and trigger OBDII code P1A2E?

Yes, extreme temperatures can impact the performance of the hybrid battery and lead to issues with voltage levels, potentially triggering the OBDII code P1A2E.

10. Are there any specific driving habits or practices that can help prevent OBDII code P1A2E in a Cadillac Hybrid related to Hybrid Battery 2 Voltage Very Low?

Driving gently, avoiding rapid acceleration and hard braking, and maintaining a consistent speed can help preserve the health of the hybrid battery and reduce the likelihood of encountering this code.