AutoCodes – Generic – P1A5E

P1A5E Code - Battery Energy Control Module Ignition On/Start Switch Circuit Low Voltage

Quick Answer

The Body Control Module (BCM) controls the ignition run relay through the control circuit by applying voltage to the circuit. Common causes include Faulty Hybrid Powertrain Control Module 2, Hybrid Powertrain Control Module 2 harness is open or shorted, Hybrid Powertrain Control Module 2 circuit poor electrical connection. 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: P1A5E indicates Battery Energy Control Module Ignition On/Start Switch Circuit Low Voltage.
Common causes: Common causes include Faulty Hybrid Powertrain Control Module 2, Hybrid Powertrain Control Module 2 harness is open or shorted, Hybrid Powertrain Control Module 2 circuit poor electrical connection.
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 1,543

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 13, 2020

Description
Possible Causes
How To Fix
Cost to Diagnose
FAQs
Comments
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Code P1A5E Description

The Body Control Module (BCM) controls the ignition run relay through the control circuit by applying voltage to the circuit. The ignition circuit is energized when the vehicle power mode is Vehicle ON or Vehicle in Service Mode. The hybrid powertrain control module 2 sends the vehicle power mode status in a serial data message to the battery charger control module, A/C compressor, battery energy control module, fuel pump control module and the Transmission Control Module (TCM).

OBDII Code P1A5E - Battery Energy Control Module Ignition On/Start Switch Circuit Low Voltage - AutoCodes.com — P1A5E Code - Battery Energy Control Module Ignition On/Start Switch Circuit Low Voltage

What does this mean?

What are the Possible Causes of the DTC P1A5E?

Faulty Hybrid Powertrain Control Module 2
Hybrid Powertrain Control Module 2 harness is open or shorted
Hybrid Powertrain Control Module 2 circuit poor electrical connection

How to Fix the DTC P1A5E?

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 P1A5E 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 P1A5E code?

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Information for Specific Makes

P1A5E Buick — Battery Energy Control Module Ignition On/Start Switch Circuit Low Voltage
P1A5E Cadillac — Battery Energy Control Module Ignition On/Start Switch Circuit Low Voltage
P1A5E Chevrolet — Battery Energy Control Module Ignition On/Start Switch Circuit Low Voltage
P1A5E GMC — Battery Energy Control Module Ignition On/Start Switch Circuit Low Voltage

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 P1A5E Code

1. What are the common symptoms of OBDII code P1A5E?

- Common symptoms include difficulty starting the vehicle, intermittent or complete loss of power, and the illumination of the check engine light.

2. What are the possible causes of OBDII code P1A5E?

- Possible causes include a faulty battery energy control module, a malfunctioning ignition switch, damaged wiring or connectors in the circuit, or a low voltage condition in the system.

3. How can I diagnose the issue related to OBDII code P1A5E?

- You can use a diagnostic scanner to retrieve the code and perform a thorough inspection of the battery energy control module, ignition switch, and associated wiring to identify any visible signs of damage or corrosion.

4. Is it safe to continue driving with OBDII code P1A5E present?

- It is not recommended to continue driving with this code present, as it can lead to potential safety hazards and further damage to the vehicle's electrical system.

5. How can I repair OBDII code P1A5E?

- Repair options may include replacing the battery energy control module, ignition switch, or repairing/replacing damaged wiring or connectors in the circuit to resolve the low voltage issue.

6. Can OBDII code P1A5E be triggered by a simple battery issue?

- Yes, a weak or failing battery can sometimes trigger this code due to insufficient voltage reaching the battery energy control module or ignition switch.

7. Are there any DIY tips for troubleshooting OBDII code P1A5E?

- DIY tips include checking the battery voltage, inspecting the battery terminals for corrosion, and visually inspecting the wiring and connectors for any signs of damage.

8. How important is it to address OBDII code P1A5E promptly?

- It is important to address this code promptly to prevent potential electrical system failures and ensure the safe operation of the vehicle.

9. Can a mechanic reset OBDII code P1A5E without fixing the underlying issue?

- While a mechanic can clear the code, it is crucial to address the root cause of the issue to prevent the code from reoccurring and causing further problems.

10. Is it necessary to visit a dealership for repairs related to OBDII code P1A5E?

- While a dealership may have specialized knowledge on this code, a qualified mechanic or auto repair shop can also diagnose and repair the issue effectively.