AutoCodesBuick – P1A24 Buick

P1A24 Buick 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 Buick 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 963
How popular is this code, among other codes? Low
Table of contents Created and updated by William Orellana on Feb 15, 2020
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Code P1A24 Buick 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 Buick - Hybrid Battery 1 Voltage - AutoCodes.com
P1A24 Buick Code - Hybrid Battery 1 Voltage

What are the Possible Causes of the DTC P1A24 Buick?

  • 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 Buick?

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 Buick 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 P1A24 Buick 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 Buick Code

1. What does the OBDII code P1A24 mean on a Buick?

P1A24 indicates an issue with the voltage in Hybrid Battery 1, specifically a problem detected by the hybrid control module.

2. What are the common symptoms of code P1A24 in a Buick?

Symptoms may include an illuminated check engine light, reduced fuel efficiency, limited hybrid system performance, or failure to start in electric mode.

3. What causes the P1A24 code to appear in a Buick?

Common causes include a faulty hybrid battery module, damaged wiring or connectors, poor voltage balance between battery cells, or a malfunctioning hybrid control module.

4. Can I drive my Buick with the P1A24 code?

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

5. How is the P1A24 code diagnosed?

A technician will use a scan tool to confirm the code, check battery cell voltages, inspect wiring and connectors, and test the hybrid control module for faults.

6. How much does it cost to repair a P1A24 code on a Buick?

Repair costs vary but can range from $200 for minor wiring repairs to over $1,000 if the hybrid battery needs replacement.

7. Can a weak 12V battery cause the P1A24 code?

While a weak 12V battery typically doesn’t cause P1A24, it can affect the hybrid system's performance and should be tested as part of the diagnosis.

8. How can I prevent the P1A24 code from occurring?

Regular maintenance of the hybrid system, including battery inspections and software updates, can help prevent voltage imbalance issues.

9. Does the P1A24 code mean the hybrid battery needs replacement?

Not always. It could be a wiring or sensor issue, but a failing hybrid battery module is a possible cause that requires further testing.

10. What tools are needed to fix a P1A24 code in a Buick?

Tools may include an OBDII scanner, a multimeter for voltage testing, and possibly specialized equipment for hybrid battery diagnostics and repair.

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