AutoCodes – Chevrolet – P1B0C Chevrolet

P1B0C Chevrolet Code - Drive Motor 1 Control Module Hybrid 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 two motor control modules. Common causes include Faulty Drive Motor 1 Control Module Hybrid/EV Battery, Drive Motor 1 Control Module Hybrid/EV Battery harness is open or shorted, Drive Motor 1 Control Module Hybrid/EV Battery 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: P1B0C Chevrolet indicates Drive Motor 1 Control Module Hybrid Battery Voltage Isolation Sensing Circuit 2 High Voltage.
Common causes: Common causes include Faulty Drive Motor 1 Control Module Hybrid/EV Battery, Drive Motor 1 Control Module Hybrid/EV Battery harness is open or shorted, Drive Motor 1 Control Module Hybrid/EV Battery 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 1,457

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 07, 2020

Description
Possible Causes
How To Fix
Cost to Diagnose
FAQs
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Code P1B0C Chevrolet Description

The power inverter module, often referred to as the drive motor generator power inverter module, contains two motor control modules. Each motor control module measures hybrid battery high voltage with several internal sensors. The motor control modules test for loss of isolation between either the high-voltage positive circuit or high-voltage negative circuit and vehicle chassis. The motor control modules test for isolation when the high-voltage contactor relays are closed. The hybrid powertrain control module 2 only tests the hybrid battery assembly for high-voltage loss of isolation when the high-voltage contactor relays are open.
Motor control module loss of isolation is detected through the use of two high-impedance resistors and voltage measuring circuitry. The two resistors are connected in series between the high- voltage positive and high-voltage negative circuits. The centre connection of the two resistors is also connected to vehicle chassis. The motor control module then measures the voltage drop across one of the resistors. Without a loss of isolation, the motor control module should measure about half of the high voltage potential. This is referred to as mid-pack voltage. The Mid-pack voltage value is then doubled by the software and displayed on a scan tool as Motor 1 Isolation Voltage or Motor 2 Isolation Voltage. When a loss of isolation is present, the motor isolation voltage display will indicate voltage that is more or less than actual hybrid battery high voltage. The motor control module monitors the loss of isolation voltage measuring circuitry for correct operation.

OBDII Code P1B0C Chevrolet - Drive Motor 1 Control Module Hybrid Battery Voltage Isolation Sensing Circuit 2 High Voltage - AutoCodes.com — P1B0C Chevrolet Code - Drive Motor 1 Control Module Hybrid Battery Voltage Isolation Sensing Circuit 2 High Voltage

What does this mean?

What are the Possible Causes of the DTC P1B0C Chevrolet?

Faulty Drive Motor 1 Control Module Hybrid/EV Battery
Drive Motor 1 Control Module Hybrid/EV Battery harness is open or shorted
Drive Motor 1 Control Module Hybrid/EV Battery circuit poor electrical connection

How to Fix the DTC P1B0C Chevrolet?

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 P1B0C Chevrolet 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 P1B0C Chevrolet Code

1. What are the common symptoms of OBDII code P1B0C in a Chevrolet related to Drive Motor 1 Control Module Hybrid Battery Voltage Isolation Sensing Circuit 2 High Voltage?

- Common symptoms include poor performance, reduced fuel efficiency, and potential drivability issues.

2. What are some possible causes of OBDII code P1B0C in a Chevrolet related to Drive Motor 1 Control Module Hybrid Battery Voltage Isolation Sensing Circuit 2 High Voltage?

- Possible causes may include a faulty drive motor control module, issues with the hybrid battery voltage isolation sensing circuit, or wiring problems.

3. How can I diagnose OBDII code P1B0C in a Chevrolet related to Drive Motor 1 Control Module Hybrid Battery Voltage Isolation Sensing Circuit 2 High Voltage?

- Diagnosis typically involves using a diagnostic scanner to retrieve the code, checking the drive motor control module and related components for any visible damage or faults, and testing the hybrid battery voltage isolation sensing circuit.

4. Can I still drive my Chevrolet with OBDII code P1B0C related to Drive Motor 1 Control Module Hybrid Battery Voltage Isolation Sensing Circuit 2 High Voltage?

- It is recommended to avoid driving the vehicle when this code is present to prevent further damage and potential safety hazards.

5. How can I repair OBDII code P1B0C in a Chevrolet related to Drive Motor 1 Control Module Hybrid Battery Voltage Isolation Sensing Circuit 2 High Voltage?

- Repair may involve replacing the drive motor control module, addressing any issues with the hybrid battery voltage isolation sensing circuit, and fixing any wiring problems.

6. Is it safe to reset the OBDII code P1B0C related to Drive Motor 1 Control Module Hybrid Battery Voltage Isolation Sensing Circuit 2 High Voltage without repairing the issue?

- It is not recommended to reset the code without addressing the underlying problem, as it may lead to recurring issues and potential safety risks.

7. Can a DIY enthusiast fix OBDII code P1B0C in a Chevrolet related to Drive Motor 1 Control Module Hybrid Battery Voltage Isolation Sensing Circuit 2 High Voltage?

- While some basic troubleshooting steps can be performed by a DIY enthusiast, complex repairs and component replacements may require professional assistance.

8. How long does it typically take to repair OBDII code P1B0C in a Chevrolet related to Drive Motor 1 Control Module Hybrid Battery Voltage Isolation Sensing Circuit 2 High Voltage?

- The repair time can vary depending on the exact cause of the code and the extent of the repairs needed. It is best to consult with a mechanic for a more accurate estimate.

9. Are there any recalls or technical service bulletins related to OBDII code P1B0C in a Chevrolet related to Drive Motor 1 Control Module Hybrid Battery Voltage Isolation Sensing Circuit 2 High Voltage?

- It is advisable to check with Chevrolet dealership or official sources for any recalls or technical service bulletins related to this specific OBDII code to stay informed about potential known issues and solutions.

10. How can I prevent OBDII code P1B0C related to Drive Motor 1 Control Module Hybrid Battery Voltage Isolation Sensing Circuit 2 High Voltage from recurring in my Chevrolet?

- Regular maintenance, timely repairs of any related issues, and following manufacturer recommendations for hybrid vehicle care can help prevent the recurrence of this OBDII code.