AutoCodes – Cadillac – P1A5F Cadillac

P1A5F Cadillac Code - Battery Energy Control Module Ignition On/Start Switch Circuit High 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: P1A5F Cadillac indicates Battery Energy Control Module Ignition On/Start Switch Circuit High 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 1,206

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 Jan 03, 2020

Description
Possible Causes
How To Fix
Cost to Diagnose
FAQs
Comments
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Code P1A5F Cadillac 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 P1A5F Cadillac - Battery Energy Control Module Ignition On/Start Switch Circuit High Voltage - AutoCodes.com — P1A5F Cadillac Code - Battery Energy Control Module Ignition On/Start Switch Circuit High Voltage

What does this mean?

What are the Possible Causes of the DTC P1A5F Cadillac?

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 P1A5F 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 P1A5F 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.

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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 P1A5F Cadillac Code

1. What does the OBDII code P1A5F mean on a Cadillac?

The code P1A5F indicates a problem with the Battery Energy Control Module Ignition On/Start Switch Circuit, specifically detecting high voltage.

2. What are the common symptoms of the P1A5F code on a Cadillac?

Symptoms may include a check engine light, failure to start, reduced power mode, or issues with hybrid or electric system performance.

3. What causes the P1A5F code to appear?

Common causes include a faulty ignition switch, wiring issues, high resistance in the circuit, a failing Battery Energy Control Module, or a short to power.

4. Can I drive my Cadillac with the P1A5F code?

Driving with this code is not recommended as it may lead to starting issues or further damage to the hybrid or battery control system.

5. How is the P1A5F code diagnosed?

A technician will use a scan tool to check for related codes, inspect the ignition switch and wiring, and test the Battery Energy Control Module for proper voltage and resistance levels.

6. What repairs can fix the P1A5F code?

Repairs may include replacing the ignition switch, repairing or replacing damaged wiring or connectors, or replacing the Battery Energy Control Module if it is defective.

7. How much does it cost to fix the P1A5F code on a Cadillac?

Repair costs vary but can range from $100 for wiring repairs to $1,000 or more if the Battery Energy Control Module needs replacement.

8. Can a dead battery cause the P1A5F code?

A weak or dead battery is unlikely to directly cause this code but may contribute to electrical issues that affect the ignition or control circuits.

9. Does the P1A5F code affect the hybrid system on a Cadillac?

Yes, this code can impact the hybrid systemâ€™s functionality, as it relates to the Battery Energy Control Module which manages hybrid battery operations.

10. How do I prevent the P1A5F code from recurring?

Regular maintenance, inspecting electrical connections, and addressing any starting or electrical issues promptly can help prevent this code from recurring.