AutoCodes – Chevrolet – P0ADC Chevrolet

P0ADC Chevrolet 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 Chevrolet 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 653

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

What does this mean?

What are the Possible Causes of the DTC P0ADC Chevrolet?

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 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 P0ADC 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 P0ADC Chevrolet Code

1. What are the common symptoms of OBDII code P0ADC in a Chevrolet hybrid/EV?

- Common symptoms include the check engine light illuminating, reduced vehicle performance, and potential issues with starting the vehicle.

2. What does the OBDII code P0ADC Chevrolet indicate?

- This code indicates a high voltage condition in the hybrid/EV battery positive contactor control circuit.

3. What are the possible causes of the P0ADC code in a Chevrolet hybrid/EV?

- Possible causes include faulty hybrid/EV battery positive contactor, damaged wiring or connectors in the control circuit, or issues with the hybrid/EV battery itself.

4. How can I diagnose the P0ADC code in my Chevrolet hybrid/EV?

- Diagnosing this code typically involves checking the condition of the hybrid/EV battery positive contactor, inspecting the wiring and connectors for damage, and testing the hybrid/EV battery voltage levels.

5. Can I continue driving my Chevrolet with the P0ADC code present?

- It is not recommended to continue driving your Chevrolet with the P0ADC code present, as it can lead to further damage to the hybrid/EV system and potential safety hazards.

6. How can I repair the P0ADC code in my Chevrolet hybrid/EV?

- Repairing the P0ADC code may involve replacing the faulty hybrid/EV battery positive contactor, repairing any damaged wiring or connectors, and ensuring proper connection and voltage levels in the control circuit.

7. Is it safe to attempt DIY repairs for the P0ADC code in a Chevrolet hybrid/EV?

- Due to the complexity of hybrid/EV systems and high voltage components, it is recommended to seek professional help or consult a certified technician for repairs related to the P0ADC code.

8. How much does it cost to fix the P0ADC code in a Chevrolet hybrid/EV?

- The cost of fixing the P0ADC code can vary depending on the exact cause of the issue, but it may involve parts replacement, labor costs, and diagnostic fees, which can range from a few hundred to over a thousand dollars.

9. Can resetting the OBDII system clear the P0ADC code in my Chevrolet hybrid/EV?

- Resetting the OBDII system may temporarily clear the code, but if the underlying issue causing the P0ADC code is not addressed, it is likely to reappear once the system detects the problem again.

10. How can I prevent the P0ADC code from recurring in my Chevrolet hybrid/EV?

- Regular maintenance, timely repairs, and monitoring the health of the hybrid/EV battery system can help prevent the recurrence of the P0ADC code in your Chevrolet.