AutoCodes – Cadillac – P1B44 Cadillac

P1B44 Cadillac Code - Drive Motor 2 Control Module Hybrid/EV Battery Voltage Isolation Sensing Circuit 2 High Voltage

Quick Answer

The power inverter module, often referred to as the drive motor generator power inverter module, contains three motor control modules and the hybrid/EV powertrain control module 1. Common causes include Faulty Hybrid/Electric Vehicle Battery Pack. 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: P1B44 Cadillac indicates Drive Motor 2 Control Module Hybrid/EV Battery Voltage Isolation Sensing Circuit 2 High Voltage.
Common causes: Common causes include Faulty Hybrid/Electric Vehicle Battery Pack.
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 910

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 Mar 12, 2020

Description
Possible Causes
How To Fix
Cost to Diagnose
FAQs
Comments
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Code P1B44 Cadillac Description

The power inverter module, often referred to as the drive motor generator power inverter module, contains three motor control modules and the hybrid/EV powertrain control module 1. Two of the motor control modules operate their respective drive motor based upon power inverter module commands. The third motor control module controls the auxiliary transmission fluid pump. The motor control modules and the hybrid/EV powertrain control module 1 are part of the power inverter module and are not serviced separately.
The motor control modules test for isolation between each high voltage bus and vehicle chassis whenever high voltage is present at the power inverter module.

OBDII Code P1B44 Cadillac - Drive Motor 2 Control Module Hybrid/EV Battery Voltage Isolation Sensing Circuit 2 High Voltage - AutoCodes.com — P1B44 Cadillac Code - Drive Motor 2 Control Module Hybrid/EV Battery Voltage Isolation Sensing Circuit 2 High Voltage

What does this mean?

What are the Possible Causes of the DTC P1B44 Cadillac?

Faulty Hybrid/Electric Vehicle Battery Pack

How to Fix the DTC P1B44 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 P1B44 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.

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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 P1B44 Cadillac Code

1. What are common symptoms of OBDII code P1B44 in a Cadillac?

- Common symptoms include reduced hybrid/EV system performance, illuminated warning lights on the dashboard, and potential drivability issues.

2. What causes the OBDII code P1B44 in a Cadillac?

- The code P1B44 typically indicates a fault with the Drive Motor 2 Control Module Hybrid/EV Battery Voltage Isolation Sensing Circuit 2, which may be caused by wiring issues, sensor malfunctions, or module failures.

3. How serious is the OBDII code P1B44 in a Cadillac?

- The code P1B44 is a serious issue as it pertains to the high voltage system in hybrid/EV vehicles. It is important to address this code promptly to prevent further damage and ensure safe operation of the vehicle.

4. Can I continue driving my Cadillac with the OBDII code P1B44 present?

- It is not recommended to continue driving the vehicle with the code P1B44 present, as it can lead to potential safety hazards and further damage to the hybrid/EV system.

5. How can I diagnose the OBDII code P1B44 in my Cadillac?

- Diagnosis of the code P1B44 requires specialized diagnostic equipment to pinpoint the exact cause of the issue. It is recommended to seek assistance from a qualified technician or dealership.

6. What are some repair tips for fixing the OBDII code P1B44 in a Cadillac?

- Repair tips may include checking and repairing wiring connections, replacing faulty sensors or modules, and performing a thorough inspection of the high voltage system components.

7. Is it safe to reset the OBDII code P1B44 without addressing the underlying issue?

- It is not safe to simply reset the code P1B44 without addressing the root cause of the problem, as it can lead to recurring issues and potential safety risks.

8. How much does it typically cost to repair the OBDII code P1B44 in a Cadillac?

- The cost of repairing the code P1B44 can vary depending on the specific cause of the issue, parts needed for replacement, and labor costs. It is advisable to obtain a professional diagnosis for an accurate estimate.

9. Can weather conditions or driving habits trigger the OBDII code P1B44 in a Cadillac?

- While weather conditions may not directly trigger the code P1B44, extreme temperatures or driving habits that put stress on the hybrid/EV system can potentially contribute to the issue.

10. Are there any recalls or technical service bulletins related to the OBDII code P1B44 in Cadillac vehicles?

- It is recommended to check with the Cadillac dealership or manufacturer for any recalls or technical service bulletins related to the OBDII code P1B44 to see if there are any known issues or remedies available.