AutoCodes – Cadillac – P1A58 Cadillac

P1A58 Cadillac 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 Cadillac 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 1,121

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

What does this mean?

What are the Possible Causes of the DTC P1A58 Cadillac?

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 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 P1A58 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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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 P1A58 Cadillac Code

1. What does the OBDII code P1A58 mean for a Cadillac?

The P1A58 code indicates that the hybrid battery pack relay is open or not functioning properly, which can affect the hybrid systemâ€™s operation.

2. What are the common symptoms of the P1A58 code?

Symptoms include the check engine light or hybrid system warning light turning on, reduced hybrid system performance, and potential failure to start the vehicle.

3. What causes the P1A58 code to appear?

The code can be triggered by a faulty hybrid battery relay, damaged or corroded wiring, a bad hybrid battery control module, or issues with the hybrid battery pack itself.

4. Can I drive my Cadillac with the P1A58 code?

Driving with the P1A58 code is not recommended, as it may lead to further damage to the hybrid system and reduced vehicle performance.

5. How is the P1A58 code diagnosed?

A technician will use a scan tool to confirm the code, inspect the hybrid battery relay and wiring, and test the relay's functionality and related components for faults.

6. What repairs can fix the P1A58 code?

Repairs may include replacing the hybrid battery relay, repairing or replacing damaged wiring, or reprogramming or replacing the hybrid battery control module.

7. How much does it cost to repair the P1A58 code on a Cadillac?

Repair costs vary but can range from $200 to $800 depending on the specific issue, such as replacing the relay or addressing wiring problems.

8. Can a weak 12-volt battery cause the P1A58 code?

While unlikely, a weak or failing 12-volt battery may indirectly affect the hybrid system, so it is worth testing to rule it out.

9. Do I need to replace the entire hybrid battery pack for the P1A58 code?

Not necessarily. Often, the issue is with the relay or wiring, and the hybrid battery pack itself may still be in good condition.

10. How can I prevent the P1A58 code from reoccurring?

Regular maintenance, inspecting the hybrid system for corrosion or damage, and addressing electrical issues promptly can help prevent the code from reappearing.