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P1A51 Cadillac 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 Cadillac 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 795

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

What does this mean?

What are the Possible Causes of the DTC P1A51 Cadillac?

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 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 P1A51 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.

Need more information about the P1A51 Cadillac code?

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

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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 Cadillac Code

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

The common symptoms include reduced electric vehicle performance, illuminated check engine light, and difficulty starting the vehicle.

2. What are the possible causes of OBDII code P1A51 in a Cadillac?

The code P1A51 can be triggered by issues such as a faulty drive motor control module, damaged wiring harness, or a software glitch in the control module's read-only memory.

3. How can I diagnose OBDII code P1A51 in a Cadillac related to the Drive Motor 1 Control Module Read Only Memory?

Diagnosis typically involves using an OBDII scanner to retrieve the specific fault code, inspecting the wiring harness for any visible damage, and checking the drive motor control module for proper functioning.

4. Can I still drive my Cadillac with OBDII code P1A51 present?

It is not recommended to drive your Cadillac with the OBDII code P1A51 present, as it can lead to further damage to the electric drive system and potentially compromise vehicle safety.

5. How can I repair OBDII code P1A51 in a Cadillac myself?

Repairing OBDII code P1A51 may require replacing the drive motor control module, repairing any damaged wiring harness, or reprogramming the control module's read-only memory. It is recommended to consult a professional mechanic for proper diagnosis and repair.

6. Will resetting the OBDII code P1A51 in a Cadillac make it go away permanently?

Resetting the OBDII code P1A51 may temporarily clear the check engine light, but if the underlying issue causing the code is not addressed, it is likely to reappear. It is important to diagnose and repair the root cause of the code.

7. Is OBDII code P1A51 specific to Cadillac vehicles only?

OBDII code P1A51 related to the Drive Motor 1 Control Module Read Only Memory is specific to Cadillac electric vehicles and hybrids equipped with this particular control module.

8. Can extreme weather conditions cause OBDII code P1A51 to trigger in a Cadillac?

Extreme weather conditions such as extreme heat or cold can potentially affect the performance of the drive motor control module, leading to the triggering of OBDII code P1A51 in a Cadillac.

9. Are there any software updates available to address OBDII code P1A51 in a Cadillac?

In some cases, software updates provided by Cadillac may address issues related to OBDII code P1A51 by improving the functionality of the drive motor control module's read-only memory.

10. How long does it typically take to repair OBDII code P1A51 in a Cadillac at a professional repair shop?

The time required to repair OBDII code P1A51 in a Cadillac can vary depending on the specific issue, but it may take a few hours to a full day for diagnosis and repair by a professional mechanic.