AutoCodes – Chevrolet – P0AD9 Chevrolet

P0AD9 Chevrolet Code - Hybrid/EV Battery Positive 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: P0AD9 Chevrolet indicates Hybrid/EV Battery Positive 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.

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Code Popularity 1,193

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
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Code P0AD9 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 P0AD9 Chevrolet - Hybrid/EV Battery Positive Contactor Control Circuit - AutoCodes.com — P0AD9 Chevrolet Code - Hybrid/EV Battery Positive Contactor Control Circuit

What does this mean?

What are the Possible Causes of the DTC P0AD9 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 P0AD9 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 P0AD9 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 P0AD9 Chevrolet Code

1. What are the common symptoms of OBDII code P0AD9 in a Chevrolet hybrid/EV vehicle?

The common symptoms include a warning light on the dashboard, reduced hybrid system performance, difficulty starting the vehicle, and potential issues with the hybrid battery.

2. What can cause the OBDII code P0AD9 to trigger in a Chevrolet hybrid/EV vehicle?

This code is typically triggered by a malfunction in the hybrid/EV battery positive contactor control circuit, which can be caused by wiring issues, damaged components, or a faulty contactor.

3. How serious is the OBDII code P0AD9 in a Chevrolet hybrid/EV vehicle?

This code should be addressed promptly as it can affect the performance and safety of the hybrid system. Continuing to drive with this code present may lead to further damage and potentially leave you stranded.

4. Can I continue driving my Chevrolet hybrid/EV vehicle with the OBDII code P0AD9 present?

It is not recommended to continue driving the vehicle with this code present, as it can result in performance issues and potential damage to the hybrid system. It's best to have the issue diagnosed and repaired as soon as possible.

5. How can I diagnose and repair the OBDII code P0AD9 in my Chevrolet hybrid/EV vehicle?

Diagnosis typically involves inspecting the wiring, connectors, and components related to the positive contactor control circuit. Repair may involve repairing or replacing damaged wiring, connectors, or components as necessary.

6. Can I fix the OBDII code P0AD9 in my Chevrolet hybrid/EV vehicle myself?

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

7. Will resetting the OBDII code P0AD9 in my Chevrolet hybrid/EV vehicle make it go away permanently?

Simply resetting the code may temporarily clear the warning light, but if the underlying issue causing the code is not addressed, it is likely to return. It's crucial to diagnose and repair the root cause of the code.

8. How much does it typically cost to repair the OBDII code P0AD9 in a Chevrolet hybrid/EV vehicle?

The cost of repairing this code can vary depending on the extent of the issue, the parts needed for repair, and the labor rates of the repair facility. It's advisable to obtain quotes from different sources for an accurate estimate.

9. Is the OBDII code P0AD9 specific to Chevrolet hybrid/EV vehicles only?

While this specific code may be related to the Chevrolet hybrid/EV battery positive contactor control circuit, similar codes related to hybrid/EV systems may apply to other vehicle makes and models with similar components.

10. How can I prevent the OBDII code P0AD9 from recurring in my Chevrolet hybrid/EV vehicle?

Regular maintenance and inspections of the hybrid system components, including the positive contactor control circuit, can help prevent issues that may trigger this code. Following the manufacturer's recommended maintenance schedule is also crucial.