AutoCodes – Buick – P0C0B Buick

P0C0B Buick Code - Drive Motor '1' Inverter Positive Voltage Circuit

Quick Answer

This is an internal fault detection of the drive motor generator Power Inverter Module (PIM) Assembly. Common causes include Reprogram Power Inverter Module (PIM) Assembly, Faulty Power Inverter Module (PIM) Assembly, Power Inverter Module (PIM) Assembly harness is open or shorted. 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: P0C0B Buick indicates Drive Motor '1' Inverter Positive Voltage Circuit.
Common causes: Common causes include Reprogram Power Inverter Module (PIM) Assembly, Faulty Power Inverter Module (PIM) Assembly, Power Inverter Module (PIM) Assembly harness is open or shorted.
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.

Save to My Repairs My Repairs

AI answers can be wrong. Verify repairs with testing. Open full chat

Code Popularity 852

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 Nov 09, 2020

Description
Possible Causes
How To Fix
Cost to Diagnose
FAQs
Comments
Add Comment

💬 Need more help? Ask Coddy for instant answers — it's free!

Code P0C0B Buick Description

This is an internal fault detection of the drive motor generator Power Inverter Module (PIM) Assembly. The PIM monitors the Drive Motor '1' Inverter. The ECM sets the OBDII code when the Drive Motor '1' Inverter is not to factory specifications. This fault is handled inside the PIM and no external circuits are involved.

OBDII Code P0C0B Buick - Drive Motor '1' Inverter Positive Voltage Circuit - AutoCodes.com — P0C0B Buick Code - Drive Motor '1' Inverter Positive Voltage Circuit

What does this mean?

What are the Possible Causes of the DTC P0C0B Buick?

Reprogram Power Inverter Module (PIM) Assembly
Faulty Power Inverter Module (PIM) Assembly
Power Inverter Module (PIM) Assembly harness is open or shorted
Power Inverter Module (PIM) Assembly circuit poor electrical connection

How to Fix the DTC P0C0B Buick?

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 P0C0B Buick 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 P0C0B Buick code?

Need more information on how to fix the P0C0B Buick code? Get Access to Factory Service Manuals

Need Help with the Code?

Get the P0C0B Buick code diagnosed by a professional: Find a repair shop in your area

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 P0C0B Buick Code

What does the OBDII code P0C0B mean on a Buick?

P0C0B indicates an issue with the Drive Motor '1' Inverter Positive Voltage Circuit, which is part of the hybrid or electric drive system.

What are the symptoms of code P0C0B in a Buick?

Symptoms may include the check engine light illuminating, reduced vehicle performance, limited EV mode functionality, or the vehicle failing to start in some cases.

What causes the P0C0B code to appear?

Common causes include a faulty drive motor inverter, damaged wiring or connectors in the positive voltage circuit, or an issue with the hybrid control module.

Can I continue driving with the P0C0B code active?

Driving with this code is not recommended as it may lead to reduced performance and potential damage to the hybrid or electric drive system.

How is the P0C0B code diagnosed?

A technician will use a scan tool to read the code, inspect the drive motor inverter and related circuits, and perform continuity and resistance tests on the wiring.

What repairs are typically needed to fix code P0C0B?

Repairs may involve replacing the drive motor inverter, repairing or replacing damaged wiring or connectors, or updating/reprogramming the hybrid control module.

How much does it cost to fix the P0C0B code on a Buick?

Repair costs vary but can range from $500 to $2000 depending on whether the inverter or other major components need replacement.

Can a weak battery cause the P0C0B code?

A weak or failing high-voltage battery is not a common cause but could indirectly contribute if it affects the inverter's operation.

Is P0C0B a common issue in Buicks with hybrid systems?

While not extremely common, it can occur in hybrid or electric Buicks due to the complexity of the high-voltage system.

What maintenance can prevent the P0C0B code?

Regular inspections of the hybrid drive components, checking for damaged wiring, and ensuring proper cooling of the inverter can help prevent this code.