AutoCodes – GMC – P1A58 GMC

P1A58 GMC Code - Hybrid Battery Pack Relay Open

Quick Answer

The Energy Storage Control Module (ESCM) will monitor the battery cut off switch for overvoltage or an open. Common causes include Faulty Hybrid Battery Cut Off Switch, Hybrid Battery Cut Off Switch harness is open or shorted, Hybrid Battery Cut Off Switch 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: P1A58 GMC indicates Hybrid Battery Pack Relay Open.
Common causes: Common causes include Faulty Hybrid Battery Cut Off Switch, Hybrid Battery Cut Off Switch harness is open or shorted, Hybrid Battery Cut Off Switch 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 914

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 19, 2020

Description
Possible Causes
How To Fix
Cost to Diagnose
FAQs
Comments
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Code P1A58 GMC Description

The Energy Storage Control Module (ESCM) will monitor the battery cut off switch for overvoltage or an open. The ESCM sets the OBDII code when the Hybrid Battery Cut Off Switch is not to factory specifications.

OBDII Code P1A58 GMC - Hybrid Battery Pack Relay Open - AutoCodes.com — P1A58 GMC Code - Hybrid Battery Pack Relay Open

What does this mean?

What are the Possible Causes of the DTC P1A58 GMC?

Faulty Hybrid Battery Cut Off Switch
Hybrid Battery Cut Off Switch harness is open or shorted
Hybrid Battery Cut Off Switch circuit poor electrical connection

How to Fix the DTC P1A58 GMC?

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 P1A58 GMC 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 P1A58 GMC Code

1. What are the common symptoms of OBDII code P1A58 in a GMC related to the Hybrid Battery Pack Relay Open?

The common symptoms include decreased fuel efficiency, loss of power, and the vehicle may not start or operate in hybrid mode.

2. What are the possible causes of the Hybrid Battery Pack Relay Open code P1A58 in a GMC vehicle?

The code P1A58 can be triggered by a faulty battery pack relay, issues with the hybrid battery pack, or problems with the high-voltage wiring.

3. How can I diagnose the Hybrid Battery Pack Relay Open code P1A58 in my GMC?

Diagnosis typically involves using an OBDII scanner to read the code, inspecting the battery pack relay and wiring connections, and testing the voltage levels in the hybrid system.

4. Is it safe to continue driving my GMC with the OBDII code P1A58 indicating a Hybrid Battery Pack Relay Open?

It is not recommended to drive the vehicle with this code present, as it can lead to further damage to the hybrid system and potentially cause safety hazards.

5. Can I reset the OBDII code P1A58 in my GMC myself, or do I need to take it to a mechanic?

While you can clear the code with an OBDII scanner, it is crucial to address the underlying issue causing the code to prevent it from reoccurring.

6. How much does it typically cost to repair the Hybrid Battery Pack Relay Open code P1A58 in a GMC?

The cost of repair can vary depending on the exact cause of the issue, but it may involve replacing the battery pack relay or addressing other components in the hybrid system. Costs can range from a few hundred to over a thousand dollars.

7. Are there any preventative maintenance tips to avoid encountering the P1A58 code in a GMC hybrid vehicle?

Regularly servicing the hybrid system, checking the battery pack connections, and ensuring the high-voltage wiring is in good condition can help prevent issues that trigger the code.

8. Can a DIY enthusiast with automotive knowledge fix the Hybrid Battery Pack Relay Open code P1A58 issue in a GMC?

Repairing the issue may require specialized knowledge and tools due to the high-voltage nature of the hybrid system, so it is recommended to seek professional assistance for safety and proper repair.

9. Will driving in extreme weather conditions affect the likelihood of triggering the OBDII code P1A58 in a GMC hybrid vehicle?

Extreme temperatures can impact the performance of the hybrid battery system and potentially lead to issues that trigger the code. It is essential to monitor the system's health in such conditions.

10. How long can I safely drive my GMC with the OBDII code P1A58 before getting it repaired?

It is best to address the issue promptly to prevent further damage to the hybrid system. Continuing to drive with the code present can worsen the problem and lead to more expensive repairs.