AutoCodes – Generic – P3019

P3019 Code - Battery Block 9 Becomes Weak

Quick Answer

If there is an abnormal internal resistance or electromotive voltage in the hybrid battery blocks, the hybrid battery Electronic Control Unit (ECU) determines that a malfunction has occurred. Common causes include Faulty HV battery assembly, Faulty Battery ECU. 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: P3019 indicates Battery Block 9 Becomes Weak.
Common causes: Common causes include Faulty HV battery assembly, Faulty Battery ECU.
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 19,365

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 Jun 23, 2019

Description
Possible Causes
How To Fix
Cost to Diagnose
FAQs
Comments
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Code P3019 Description

If there is an abnormal internal resistance or electromotive voltage in the hybrid battery blocks, the hybrid battery Electronic Control Unit (ECU) determines that a malfunction has occurred. When the malfunction detection condition is satisfied, the battery ECU illuminates the MIL and sets a Diagnostic Trouble Code (DTC).

OBDII Code P3019 - Battery Block 9 Becomes Weak - AutoCodes.com — P3019 Code - Battery Block 9 Becomes Weak

What does this mean?

What are the Possible Causes of the DTC P3019?

Faulty HV battery assembly
Faulty Battery ECU

How to Fix the DTC P3019?

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 P3019 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 P3019 code?

Need more information on how to fix the P3019 code? Get Access to Factory Service Manuals

Need Help with the Code?

Get the P3019 code diagnosed by a professional: Find a repair shop in your area

Information for Specific Makes

P3019 Lexus — Battery Block 9 Becomes Weak
P3019 Toyota — Battery Block 9 Becomes Weak

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 P3019 Code

1. What are the common symptoms of OBDII code P3019 (Battery Block 9 Becomes Weak)?

- Common symptoms include poor engine performance, reduced fuel efficiency, and difficulty starting the vehicle.

2. What can cause OBDII code P3019 to trigger?

- This code is typically triggered by a weak or failing battery in Block 9 of the battery pack in hybrid or electric vehicles.

3. How can I diagnose the issue related to OBDII code P3019?

- You can diagnose the issue by performing a battery voltage test on Block 9 of the battery pack using a multimeter or diagnostic tool.

4. Can a weak battery in Block 9 be repaired, or does it need to be replaced?

- In most cases, a weak battery in Block 9 will need to be replaced to resolve the issue and clear the OBDII code P3019.

5. Is it safe to continue driving with OBDII code P3019 present?

- It is not recommended to continue driving with this code present, as it can lead to further damage to the vehicle's electrical system.

6. Are there any preventive measures to avoid OBDII code P3019 from occurring?

- Regularly checking and maintaining the health of the battery pack, including Block 9, can help prevent this code from occurring.

7. How much does it typically cost to replace the battery in Block 9 of a hybrid or electric vehicle?

- The cost of replacing the battery in Block 9 can vary depending on the make and model of the vehicle, but it can range from a few hundred to a few thousand dollars.

8. Can a DIY enthusiast replace the battery in Block 9 themselves?

- Due to the complexity and safety considerations involved in working with high-voltage batteries, it is recommended to have a professional technician replace the battery in Block 9.

9. Will clearing the OBDII code P3019 make the issue go away permanently?

- Clearing the code may temporarily reset the error message, but if the underlying issue of a weak battery in Block 9 is not addressed, the code is likely to reappear.

10. How long does it typically take to replace the battery in Block 9 of a hybrid or electric vehicle?

- The time required to replace the battery in Block 9 can vary depending on the vehicle and the technician's expertise, but it generally takes a few hours to half a day.