AutoCodes – GMC – P0ADB GMC

P0ADB GMC Code - Hybrid/EV Battery Positive Contactor Control Circuit Low Voltage

Quick Answer

The hybrid battery system voltage is controlled by two high voltage contactors. Common causes include Faulty Starter/Generator Control Module, Starter/Generator Control Module harness is open or shorted, Starter/Generator Control Module 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: P0ADB GMC indicates Hybrid/EV Battery Positive Contactor Control Circuit Low Voltage.
Common causes: Common causes include Faulty Starter/Generator Control Module, Starter/Generator Control Module harness is open or shorted, Starter/Generator Control Module 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 665

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 20, 2019

Description
Possible Causes
How To Fix
Cost to Diagnose
FAQs
Comments
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Code P0ADB GMC Description

The hybrid battery system voltage is controlled by two high voltage contactors. The high voltage contactors allow the high voltage DC batteries to be connected to the vehicle or safely contain the high voltage DC within the Hybrid/EV Battery Pack assembly. Of the two contactors, one is a pre-charge contactor and the other is the primary contactor. The two contactors are closed in a specific sequence by the Starter/Generator Control Module. The pre-charge contactor is closed first. This causes high voltage to flow through the pre-charge resistor, allowing system voltage to build slowly. Once the system voltage has raised and stabilized, the primary contactor is closed. Both contactors are controlled by the Starter/Generator Control Module. The Starter/Generator Control Module supplies B+ to each contactor at all times. When the contactors are to be closed, the Starter/Generator Control Module will provide a ground to the contactor through a low side driver.

OBDII Code P0ADB GMC - Hybrid/EV Battery Positive Contactor Control Circuit Low Voltage - AutoCodes.com — P0ADB GMC Code - Hybrid/EV Battery Positive Contactor Control Circuit Low Voltage

What does this mean?

What are the Possible Causes of the DTC P0ADB GMC?

Faulty Starter/Generator Control Module
Starter/Generator Control Module harness is open or shorted
Starter/Generator Control Module circuit poor electrical connection

How to Fix the DTC P0ADB GMC?

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 P0ADB GMC 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 P0ADB GMC Code

1. What are common symptoms of OBDII code P0ADB in a GMC related to Hybrid/EV Battery Positive Contactor Control Circuit Low Voltage?

- Common symptoms include difficulty starting the vehicle, reduced power or acceleration, and warning lights on the dashboard related to the hybrid or EV system.

2. What are possible causes of OBDII code P0ADB in a GMC indicating Hybrid/EV Battery Positive Contactor Control Circuit Low Voltage?

- Possible causes can include a faulty high voltage battery, issues with the positive contactor control circuit, damaged wiring, or a malfunctioning control module.

3. How can I diagnose the Hybrid/EV Battery Positive Contactor Control Circuit Low Voltage issue triggering OBDII code P0ADB in my GMC?

- Diagnosis typically involves using a scan tool to read the trouble code, inspecting the high voltage battery connections, checking the positive contactor control circuit for continuity, and testing the control module.

4. Is it safe to drive my GMC with the OBDII code P0ADB indicating Hybrid/EV Battery Positive Contactor Control Circuit Low Voltage?

- It is not recommended to drive the vehicle with this issue as it can lead to further damage to the hybrid or EV system. It is best to have the problem diagnosed and repaired promptly.

5. Can I repair OBDII code P0ADB related to Hybrid/EV Battery Positive Contactor Control Circuit Low Voltage in my GMC myself?

- While some DIY enthusiasts may attempt to diagnose and repair this issue, it is recommended to seek assistance from a professional mechanic or dealership with experience in hybrid and EV systems due to the complexities involved.

6. How much does it typically cost to repair OBDII code P0ADB in a GMC indicating Hybrid/EV Battery Positive Contactor Control Circuit Low Voltage?

- The cost of repairs can vary depending on the exact cause of the issue, but it may range from a few hundred to over a thousand dollars, including parts and labor.

7. Will resetting the OBDII code P0ADB related to Hybrid/EV Battery Positive Contactor Control Circuit Low Voltage make the problem go away?

- Simply clearing the trouble code without addressing the underlying issue will not solve the problem. It is important to diagnose and repair the root cause of the code to prevent further issues.

8. Are there any preventative maintenance steps I can take to avoid OBDII code P0ADB in my GMC indicating Hybrid/EV Battery Positive Contactor Control Circuit Low Voltage?

- Regularly inspecting the high voltage battery connections, keeping an eye on warning lights, and following the manufacturer's recommended maintenance schedule for the hybrid or EV system can help prevent such issues.

9. Can extreme weather conditions affect the likelihood of triggering OBDII code P0ADB in a GMC related to Hybrid/EV Battery Positive Contactor Control Circuit Low Voltage?

- Extreme temperatures, both hot and cold, can potentially impact the performance of the high voltage system in hybrid and EV vehicles, increasing the risk of issues like low voltage in the positive contactor control circuit.

10. How long does it typically take to repair OBDII code P0ADB indicating Hybrid/EV Battery Positive Contactor Control Circuit Low Voltage in a GMC?

- The repair time can vary based on the specific diagnosis and required repairs. In some cases, it may be resolved quickly, while more complex issues could take several hours or even days to fully address.