AutoCodes – GMC – P1A51 GMC

P1A51 GMC Code - Drive Motor 1 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: P1A51 GMC indicates Drive Motor 1 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 1,025

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 P1A51 GMC 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 P1A51 GMC - Drive Motor 1 Control Module Read Only Memory - AutoCodes.com — P1A51 GMC Code - Drive Motor 1 Control Module Read Only Memory

What does this mean?

What are the Possible Causes of the DTC P1A51 GMC?

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 P1A51 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 P1A51 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 P1A51 GMC Code

1. What are the common symptoms of OBDII code P1A51 in a GMC vehicle?

The common symptoms of OBDII code P1A51 include poor acceleration, reduced power output, and the vehicle going into a limp mode.

2. What does the OBDII code P1A51 in a GMC indicate?

OBDII code P1A51 in a GMC indicates a malfunction in the Drive Motor 1 Control Module Read Only Memory, affecting the control module's ability to operate efficiently.

3. What are the potential causes of OBDII code P1A51 in a GMC?

Potential causes of OBDII code P1A51 in a GMC include a faulty Drive Motor 1 Control Module, issues with the module's read-only memory, or wiring/connectivity problems.

4. How can I diagnose OBDII code P1A51 in my GMC vehicle?

Diagnosing OBDII code P1A51 involves using a diagnostic scanner to retrieve the code, checking the Drive Motor 1 Control Module for any visible damage, and inspecting the wiring connections for any signs of wear or corrosion.

5. Can I continue driving my GMC with OBDII code P1A51 present?

It is not recommended to continue driving your GMC with OBDII code P1A51 present, as it can lead to further damage to the drive motor control module and potentially affect the vehicle's performance.

6. How can OBDII code P1A51 in a GMC be repaired?

Repairing OBDII code P1A51 may involve reprogramming or replacing the Drive Motor 1 Control Module, addressing any issues with the read-only memory, and ensuring proper wiring connections.

7. Is it possible to reset OBDII code P1A51 in a GMC without repairs?

While you can reset the OBDII code P1A51 using a diagnostic scanner, it is essential to address the underlying issue causing the code to prevent it from recurring.

8. Are there any preventive measures to avoid OBDII code P1A51 in a GMC?

To prevent OBDII code P1A51, regular maintenance checks, avoiding rough driving conditions, and addressing any warning signs promptly can help maintain the health of the Drive Motor 1 Control Module.

9. Can a DIY enthusiast fix OBDII code P1A51 in a GMC?

While some DIY enthusiasts may be able to address simple causes like loose wiring connections, diagnosing and repairing OBDII code P1A51 often requires specialized tools and expertise, best left to professionals.

10. How much does it typically cost to repair OBDII code P1A51 in a GMC?

The cost to repair OBDII code P1A51 in a GMC can vary depending on the extent of the damage, the need for module replacement, and labor costs, with estimates ranging from a few hundred to over a thousand dollars.