AutoCodes – Chevrolet – P0ADD Chevrolet

P0ADD Chevrolet Code - Hybrid/EV Battery Negative Contactor Control Circuit

Quick Answer

The hybrid/EV battery contains 5 high voltage contactors and 2 transistors. Common causes include Faulty Battery Energy Control Module, Battery Energy Control Module harness is open or shorted, Battery Energy 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: P0ADD Chevrolet indicates Hybrid/EV Battery Negative Contactor Control Circuit.
Common causes: Common causes include Faulty Battery Energy Control Module, Battery Energy Control Module harness is open or shorted, Battery Energy 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.

Save to My Repairs My Repairs

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

Code Popularity 1,237

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 Apr 25, 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 P0ADD Chevrolet Description

The hybrid/EV battery contains 5 high voltage contactors and 2 transistors. The high voltage contactors and transistors allow the high voltage DC batteries to be connected to the vehicle or safely contain the high voltage DC within the hybrid/EV battery assembly. The 5 high voltage contactors consist of a main positive high voltage contactor, main negative high voltage contactor, charge positive high voltage contactor, charge negative high voltage contactor and multi-function high voltage contactor. The 2 transistors consist of the precharge transistor and heater transistor. The contactors and transistors close and open in a specific sequence controlled by the hybrid/EV powertrain control module 2. The hybrid/EV powertrain control module 2 supplies voltage to the control circuit for the high voltage contactors/transistors. Ground is provided through the case ground.

OBDII Code P0ADD Chevrolet - Hybrid/EV Battery Negative Contactor Control Circuit - AutoCodes.com — P0ADD Chevrolet Code - Hybrid/EV Battery Negative Contactor Control Circuit

What does this mean?

What are the Possible Causes of the DTC P0ADD Chevrolet?

Faulty Battery Energy Control Module
Battery Energy Control Module harness is open or shorted
Battery Energy Control Module circuit poor electrical connection

How to Fix the DTC P0ADD 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 P0ADD 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.

Need more information about the P0ADD Chevrolet code?

Need more information on how to fix the P0ADD Chevrolet code? Get Access to Factory Service Manuals

Need Help with the Code?

Get the P0ADD Chevrolet 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 P0ADD Chevrolet Code

1. What does the OBDII code P0ADD mean on a Chevrolet?

P0ADD indicates an issue with the Hybrid/EV battery negative contactor control circuit, which is responsible for managing the connection between the high-voltage battery and the vehicle's electrical system.

2. What are the symptoms of a P0ADD code in a Chevrolet?

Symptoms may include the vehicle not starting, reduced power or performance, warning lights on the dashboard, or the inability to engage the hybrid/EV system.

3. What causes the P0ADD code in Chevrolet vehicles?

Common causes include a faulty negative contactor, damaged wiring or connectors in the control circuit, a malfunctioning battery control module, or a software issue.

4. Can I drive my Chevrolet with a P0ADD code?

Driving with a P0ADD code is not recommended, as it may lead to further damage or cause the vehicle to lose power unexpectedly.

5. How is the P0ADD code diagnosed?

Technicians typically use a scan tool to confirm the code, inspect the wiring and connectors in the control circuit, test the negative contactor, and check the battery control module for faults.

6. How do you fix the P0ADD code on a Chevrolet?

Repairs may include replacing the negative contactor, repairing or replacing damaged wiring or connectors, updating the vehicle's software, or replacing the battery control module if necessary.

7. How much does it cost to fix a P0ADD code in a Chevrolet?

Repair costs vary depending on the root cause but can range from $200 to $1,000 or more, especially if major components like the battery control module need to be replaced.

8. Is the P0ADD code specific to Chevrolet hybrid/EV vehicles?

Yes, the P0ADD code is specific to hybrid and electric vehicles, as it refers to the high-voltage battery system, which is not present in traditional gasoline-powered cars.

9. Can a low-voltage battery cause the P0ADD code?

While rare, a weak or failing 12-volt battery could potentially contribute to issues with the control circuit, as it powers the vehicle's electrical systems.

10. Will clearing the P0ADD code fix the problem?

Clearing the code may turn off the warning temporarily, but it will likely return if the underlying issue is not resolved. Proper diagnosis and repair are necessary.