AutoCodes – Generic – P0D09

P0D09 Code - Battery Charging System Positive Contactor Stuck Open

Quick Answer

The hybrid/EV battery contains 4 high voltage contactors and 1 solid state relay (transistor). 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: P0D09 indicates Battery Charging System Positive Contactor Stuck Open.
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 3,227

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 27, 2020

Description
Possible Causes
How To Fix
Cost to Diagnose
FAQs
Comments
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Code P0D09 Description

The hybrid/EV battery contains 4 high voltage contactors and 1 solid state relay (transistor). The high voltage contactors and transistor allow the high voltage DC batteries to be connected to the vehicle or contain the high voltage DC within the hybrid/EV battery assembly. The 4 high voltage contactors consist of a main positive high voltage contactor, main negative high voltage contactor, charge positive high voltage contactor and a precharge negative high voltage contactor. The transistor controls the battery heater high voltage positive circuit. The contactors and transistor 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 each high voltage contactor/transistor. Ground is provided through a vehicle ground external of the high voltage battery.

OBDII Code P0D09 - Battery Charging System Positive Contactor Stuck Open - AutoCodes.com — P0D09 Code - Battery Charging System Positive Contactor Stuck Open

What does this mean?

What are the Possible Causes of the DTC P0D09?

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 P0D09?

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 P0D09 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 P0D09 code?

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Need Help with the Code?

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Information for Specific Makes

P0D09 Buick — Battery Charging System Positive Contactor Stuck Open
P0D09 Cadillac — Battery Charging System Positive Contactor Stuck Open
P0D09 Chevrolet — Battery Charging System Positive Contactor Stuck Open
P0D09 GMC — Battery Charging System Positive Contactor Stuck Open
P0D09 Saturn — Battery Charging System Positive Contactor Stuck Open

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 P0D09 Code

1. What are the common symptoms of OBDII code P0D09 (Battery Charging System Positive Contactor Stuck Open)?

The common symptoms of this code include difficulty starting the vehicle, dimming or flickering lights, and a dashboard warning light indicating a charging system issue.

2. What can cause the Battery Charging System Positive Contactor to become stuck open?

The contactor can become stuck open due to corrosion, electrical faults, mechanical failure, or issues with the contactor relay.

3. How can I diagnose the cause of OBDII code P0D09?

Diagnosing the cause of this code typically involves inspecting the contactor, relay, wiring connections, and testing the charging system components using a multimeter.

4. Can I still drive my vehicle with OBDII code P0D09 present?

It is not recommended to drive the vehicle with this code present, as it can lead to a drained battery and potential electrical system damage.

5. What are the repair options for OBDII code P0D09?

Repair options for this code may include cleaning or replacing the contactor, checking and repairing any wiring issues, or replacing the contactor relay if necessary.

6. How much does it cost to repair OBDII code P0D09?

The cost of repairing this code can vary depending on the extent of the issue, the parts needed, and whether you choose to do the repair yourself or take it to a professional mechanic.

7. Can a DIY enthusiast fix OBDII code P0D09 at home?

Depending on your level of automotive repair experience, fixing this code at home may be possible by following online guides or service manuals. However, it is recommended to have the necessary tools and knowledge to safely work on the vehicle's electrical system.

8. Will resetting the OBDII code P0D09 make it go away permanently?

Resetting the code may temporarily clear the warning light, but if the underlying issue causing the code is not fixed, the code will likely reappear once the problem is detected again by the vehicle's onboard diagnostic system.

9. How urgent is it to address OBDII code P0D09?

It is essential to address this code promptly to prevent potential damage to the vehicle's electrical system and ensure the proper functioning of the charging system.

10. Can OBDII code P0D09 affect the performance of my vehicle?

Yes, this code can affect the performance of the vehicle by causing charging system issues, which can lead to a drained battery, electrical malfunctions, and ultimately impact the overall performance of the vehicle.