AutoCodes – GMC – P0ADC GMC

P0ADC GMC Code - Hybrid/EV Battery Positive Contactor Control Circuit High 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: P0ADC GMC indicates Hybrid/EV Battery Positive Contactor Control Circuit High 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 740

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 P0ADC 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 P0ADC GMC - Hybrid/EV Battery Positive Contactor Control Circuit High Voltage - AutoCodes.com — P0ADC GMC Code - Hybrid/EV Battery Positive Contactor Control Circuit High Voltage

What does this mean?

What are the Possible Causes of the DTC P0ADC 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 P0ADC 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 P0ADC 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 P0ADC GMC Code

1. What are the common symptoms of OBDII code P0ADC in a GMC related to Hybrid/EV Battery Positive Contactor Control Circuit High Voltage?

- Common symptoms include check engine light illumination, decreased fuel efficiency, and potential issues with the hybrid/EV system's performance.

2. What are the possible causes of OBDII code P0ADC in a GMC indicating Hybrid/EV Battery Positive Contactor Control Circuit High Voltage?

- The code may be triggered by issues such as a faulty positive contactor, damaged wiring or connectors, a defective control module, or a malfunction in the hybrid/EV battery system.

3. How can I diagnose the OBDII code P0ADC in my GMC for the Hybrid/EV Battery Positive Contactor Control Circuit High Voltage issue?

- Diagnosis typically involves using a scan tool to read the code, inspecting the positive contactor and its circuit, testing the control module, and checking for any visible signs of damage or corrosion in the wiring.

4. Are there any safety precautions to keep in mind when working on OBDII code P0ADC related to the Hybrid/EV Battery Positive Contactor Control Circuit High Voltage in a GMC?

- It is crucial to disconnect the hybrid/EV battery before conducting any diagnostic or repair work to avoid the risk of electric shock or damage to the vehicle's electrical components.

5. What are some repair tips for addressing OBDII code P0ADC in a GMC associated with Hybrid/EV Battery Positive Contactor Control Circuit High Voltage?

- Repair tips may include replacing the faulty positive contactor, repairing or replacing damaged wiring, cleaning or replacing connectors, and reprogramming or replacing the control module if necessary.

6. Can driving with OBDII code P0ADC related to Hybrid/EV Battery Positive Contactor Control Circuit High Voltage in a GMC cause further damage?

- Continuing to drive with this code may lead to potential issues with the hybrid/EV system's performance and could potentially cause damage to other components in the vehicle.

7. How much does it typically cost to repair OBDII code P0ADC in a GMC for the Hybrid/EV Battery Positive Contactor Control Circuit High Voltage?

- Repair costs can vary depending on the extent of the issue, the parts needed for replacement, and labor charges. It is recommended to consult with a qualified mechanic for an accurate estimate.

8. Are there any recalls or technical service bulletins related to OBDII code P0ADC in a GMC for the Hybrid/EV Battery Positive Contactor Control Circuit High Voltage?

- It is advisable to check with the manufacturer or a dealership for any recalls or technical service bulletins that may address this specific code and related issues in GMC vehicles.

9. Can resetting the OBDII system clear the P0ADC code related to Hybrid/EV Battery Positive Contactor Control Circuit High Voltage in a GMC?

- Resetting the OBDII system may temporarily clear the code, but it is important to diagnose and address the underlying issue to prevent the code from reoccurring.

10. Is it possible to prevent OBDII code P0ADC in a GMC for the Hybrid/EV Battery Positive Contactor Control Circuit High Voltage from happening in the future?

- Regular maintenance and inspections of the hybrid/EV system, including checking the condition of the positive contactor, wiring, and connectors, can help prevent this code from occurring in the future.