AutoCodes – Cadillac – P1A24 Cadillac

P1A24 Cadillac Code - Hybrid Battery 1 Voltage

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: P1A24 Cadillac indicates Hybrid Battery 1 Voltage.
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 818

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 P1A24 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 P1A24 Cadillac - Hybrid Battery 1 Voltage - AutoCodes.com — P1A24 Cadillac Code - Hybrid Battery 1 Voltage

What does this mean?

What are the Possible Causes of the DTC P1A24 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 P1A24 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 P1A24 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 P1A24 Cadillac Code

1. What does OBDII code P1A24 mean on a Cadillac?

P1A24 indicates an issue with the voltage of Hybrid Battery 1, often related to a voltage imbalance or failure in the hybrid battery system.

2. What are the common symptoms of code P1A24 on a Cadillac?

Symptoms may include reduced fuel efficiency, a hybrid system warning light, decreased vehicle performance, or the inability to switch between engine and electric modes.

3. What causes code P1A24 to appear on a Cadillac?

This code is typically caused by a faulty hybrid battery module, a voltage sensor issue, poor electrical connections, or degraded battery cells.

4. Can you drive a Cadillac with code P1A24?

While the vehicle may still be drivable, continuing to drive with this code can lead to further damage to the hybrid system or reduced performance.

5. How is code P1A24 diagnosed in a Cadillac?

A technician will use a diagnostic scanner to read the code, inspect the hybrid battery for faults, check voltage levels, and test the battery control module.

6. What is the most common fix for code P1A24?

Replacing the faulty hybrid battery module or repairing damaged connections typically resolves the issue.

7. Does code P1A24 always mean the hybrid battery needs replacement?

No, sometimes the issue lies with a voltage sensor or wiring rather than the battery itself.

8. How much does it cost to fix code P1A24 on a Cadillac?

The cost can vary widely depending on whether the hybrid battery needs replacement or if only minor repairs, such as fixing wiring, are required.

9. Can low voltage in the 12V battery cause code P1A24 on a Cadillac?

While unlikely, a low 12V battery can sometimes cause related hybrid system errors. Testing the 12V battery is still recommended during diagnosis.

10. How can code P1A24 be prevented?

Regular maintenance of the hybrid system, including battery inspections and ensuring proper electrical connections, can help prevent this code from appearing.