AutoCodes – Generic – P1A51

P1A51 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 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 3,179

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

What does this mean?

What are the Possible Causes of the DTC P1A51?

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?

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 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 P1A51 code?

Need more information on how to fix the P1A51 code? Get Access to Factory Service Manuals

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Get the P1A51 code diagnosed by a professional: Find a repair shop in your area

Information for Specific Makes

P1A51 Buick — Drive Motor 1 Control Module Read Only Memory
P1A51 Cadillac — Drive Motor 1 Control Module Read Only Memory
P1A51 Chevrolet — Drive Motor 1 Control Module Read Only Memory
P1A51 GMC — Drive Motor 1 Control Module Read Only Memory

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 Code

1. What are common symptoms of OBDII code P1A51 related to the Drive Motor 1 Control Module Read Only Memory?

The common symptoms include poor vehicle performance, reduced fuel efficiency, and potential issues with the electric drive system.

2. What could cause the OBDII code P1A51 to trigger for the Drive Motor 1 Control Module Read Only Memory?

Possible causes of this code include a faulty control module, issues with the drive motor, electrical problems, or damaged wiring.

3. How can I diagnose the OBDII code P1A51 for the Drive Motor 1 Control Module Read Only Memory?

Diagnosis typically involves using a scan tool to read the code, checking for any other related codes, and conducting a thorough inspection of the control module and drive motor components.

4. Is it safe to continue driving with the OBDII code P1A51 present for the Drive Motor 1 Control Module Read Only Memory?

It is not recommended to drive with this code as it can lead to further damage to the electric drive system and potentially compromise vehicle safety.

5. What are some repair tips for addressing the OBDII code P1A51 regarding the Drive Motor 1 Control Module Read Only Memory?

Repair tips may include checking and repairing any damaged wiring, replacing the control module or drive motor if necessary, and ensuring proper connections and electrical grounding.

6. Can I reset the OBDII code P1A51 related to the Drive Motor 1 Control Module Read Only Memory on my own?

While you can attempt to clear the code using a scan tool, it is essential to address the underlying issue causing the code to prevent it from reoccurring.

7. How much does it typically cost to repair the OBDII code P1A51 for the Drive Motor 1 Control Module Read Only Memory?

The cost of repair can vary depending on the extent of the damage and the specific components that need to be replaced, but it may range from a few hundred to a few thousand dollars.

8. Are there any recalls or service bulletins related to the OBDII code P1A51 and the Drive Motor 1 Control Module Read Only Memory?

It is advisable to check with the vehicle manufacturer or authorized dealerships for any recalls or service bulletins related to this specific OBDII code and associated components.

9. Can a DIY enthusiast with automotive knowledge repair the OBDII code P1A51 for the Drive Motor 1 Control Module Read Only Memory?

While some basic troubleshooting and repairs may be possible for experienced DIY enthusiasts, dealing with electric drive system components can be complex and may require professional assistance.

10. How long does it take to repair the OBDII code P1A51 for the Drive Motor 1 Control Module Read Only Memory?

The repair time can vary depending on the extent of the issue, availability of parts, and the expertise of the mechanic, but it may take a few hours to a full day to address the problem effectively.