AutoCodes – Buick – P1A54 Buick

P1A54 Buick Code - Drive Motor 2 Control Module Read Only Memory

Quick Answer

The drive motor control modules are internal to the Power Inverter Module, often referred to as the drive motor-generator Power Inverter Module, and are not serviced separately. Common causes include Faulty Power Inverter Module (PIM), Power Inverter Module (PIM) harness is open or shorted, Power Inverter Module (PIM) 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: P1A54 Buick indicates Drive Motor 2 Control Module Read Only Memory.
Common causes: Common causes include Faulty Power Inverter Module (PIM), Power Inverter Module (PIM) harness is open or shorted, Power Inverter Module (PIM) 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 858

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 Aug 03, 2020

Description
Possible Causes
How To Fix
Cost to Diagnose
FAQs
Comments
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Code P1A54 Buick Description

The drive motor control modules are internal to the Power Inverter Module, often referred to as the drive motor-generator Power Inverter Module, and are not serviced separately. This fault is handled inside the drive motor control modules and no external circuits are involved. The Diagnostic Trouble Code (DTC) will set when the Power Inverter Module has detected an internal malfunction, or a service module has been installed but not yet programmed.

OBDII Code P1A54 Buick - Drive Motor 2 Control Module Read Only Memory - AutoCodes.com — P1A54 Buick Code - Drive Motor 2 Control Module Read Only Memory

What does this mean?

What are the Possible Causes of the DTC P1A54 Buick?

Faulty Power Inverter Module (PIM)
Power Inverter Module (PIM) harness is open or shorted
Power Inverter Module (PIM) circuit poor electrical connection

How to Fix the DTC P1A54 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 P1A54 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 P1A54 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 P1A54 Buick Code

1. What does the OBDII code P1A54 mean on a Buick?

The P1A54 code indicates an issue with the Drive Motor 2 Control Module's Read Only Memory (ROM), which may involve corrupted data or a malfunction in the module.

2. What are common symptoms of the P1A54 code on a Buick?

Symptoms may include reduced engine performance, the illumination of the check engine light, and possible issues with electric drive functionality in hybrid or electric Buicks.

3. What causes the P1A54 code to appear in a Buick?

Common causes include a fault in the Drive Motor 2 Control Module, corrupted software, or a failure in the module's internal memory.

4. Can a faulty Drive Motor 2 Control Module trigger the P1A54 code?

Yes, a malfunctioning Drive Motor 2 Control Module can cause this code by failing to store or retrieve essential memory data.

5. How serious is the P1A54 code on a Buick?

The P1A54 code is moderately serious, as it can affect vehicle performance and may lead to further issues if not addressed promptly.

6. How is the P1A54 code diagnosed on a Buick?

Diagnosis typically involves scanning for additional codes, inspecting the Drive Motor 2 Control Module, and checking for software or hardware issues.

7. Can the P1A54 code be resolved with a software update?

In some cases, updating the Drive Motor 2 Control Module software can resolve the issue if the problem stems from corrupted firmware.

8. Is replacing the Drive Motor 2 Control Module necessary to fix the P1A54 code?

Replacement may be required if the module is physically damaged or if reprogramming and software updates fail to resolve the issue.

9. Can a weak or failing battery cause the P1A54 code in a Buick?

While unlikely, voltage irregularities from a weak or failing battery can potentially contribute to memory errors in the control module.

10. What should I do if my Buick shows the P1A54 code?

It's recommended to take your vehicle to a qualified technician to diagnose and repair the issue, as specialized tools and expertise are often required.