AutoCodes – Chevrolet – P303B Chevrolet

P303B Chevrolet Code - Hybrid/EV Battery Interface Control Module 12 Not Programmed

Quick Answer

When the Battery Energy Control Module is flash programmed, the Hybrid/EV Battery Interface Control Module operating software and calibrations are provided to the Battery Energy Control Module. Common causes include Reprogram Hybrid/EV Battery Interface Control Module, Faulty Hybrid/EV Battery Interface Control Module, Hybrid/EV Battery Interface Control Module harness is open or shorted. 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: P303B Chevrolet indicates Hybrid/EV Battery Interface Control Module 12 Not Programmed.
Common causes: Common causes include Reprogram Hybrid/EV Battery Interface Control Module, Faulty Hybrid/EV Battery Interface Control Module, Hybrid/EV Battery Interface Control Module harness is open or shorted.
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 943

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 P303B Chevrolet Description

When the Battery Energy Control Module is flash programmed, the Hybrid/EV Battery Interface Control Module operating software and calibrations are provided to the Battery Energy Control Module. The Hybrid/EV Battery Interface Control Module software and calibrations are then loaded to each of the Hybrid/EV Battery Interface Control Modules from the Battery Energy Control Module. This operation is automatic and requires no operator action. At this point, if any of the Hybrid/EV Battery Interface Control Modules are not programmed correctly, the appropriate DTC is set.
This fault is internal to the Hybrid/EV Battery Interface Control Modules and no external circuits are involved.

OBDII Code P303B Chevrolet - Hybrid/EV Battery Interface Control Module 12 Not Programmed - AutoCodes.com — P303B Chevrolet Code - Hybrid/EV Battery Interface Control Module 12 Not Programmed

What does this mean?

What are the Possible Causes of the DTC P303B Chevrolet?

Reprogram Hybrid/EV Battery Interface Control Module
Faulty Hybrid/EV Battery Interface Control Module
Hybrid/EV Battery Interface Control Module harness is open or shorted
Hybrid/EV Battery Interface Control Module circuit poor electrical connection

How to Fix the DTC P303B 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 P303B 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 P303B Chevrolet Code

1. What are common symptoms of OBDII code P303B in a Chevrolet Hybrid/EV vehicle?

The common symptoms of OBDII code P303B may include issues with hybrid/EV battery performance, reduced fuel efficiency, and potential drivability issues.

2. What does the OBDII code P303B Chevrolet indicate?

OBDII code P303B for Chevrolet vehicles specifically refers to the Hybrid/EV Battery Interface Control Module 12 Not Programmed.

3. What are possible causes of the P303B code in a Chevrolet Hybrid/EV?

Possible causes of the P303B code in a Chevrolet Hybrid/EV vehicle include a malfunctioning hybrid/EV battery interface control module, software glitches, or issues related to programming.

4. How can I diagnose the P303B code in my Chevrolet Hybrid/EV vehicle?

Diagnosing the P303B code in a Chevrolet Hybrid/EV vehicle typically involves using an OBDII scanner to retrieve the code, inspecting the hybrid/EV battery system, and checking for any programming errors.

5. What are the repair options for OBDII code P303B in a Chevrolet Hybrid/EV?

Repair options for OBDII code P303B in a Chevrolet Hybrid/EV vehicle may involve reprogramming the Hybrid/EV Battery Interface Control Module, addressing any software issues, or replacing the control module if necessary.

6. Can I continue driving my Chevrolet Hybrid/EV with the P303B code present?

It is not recommended to drive your Chevrolet Hybrid/EV with the P303B code present, as it can lead to potential performance issues and further damage to the hybrid/EV system.

7. How serious is the OBDII code P303B for a Chevrolet Hybrid/EV?

OBDII code P303B for a Chevrolet Hybrid/EV should be addressed promptly to prevent any potential damage to the hybrid/EV system and to ensure optimal vehicle performance.

8. Is it possible to reset the P303B code in a Chevrolet Hybrid/EV without professional help?

While you may be able to clear the P303B code temporarily using an OBDII scanner, it is recommended to have a professional diagnose and repair the underlying issue to prevent the code from reoccurring.

9. Are there any common related codes that may accompany P303B in a Chevrolet Hybrid/EV?

Common related codes that may accompany P303B in a Chevrolet Hybrid/EV include codes related to the hybrid/EV battery system, communication errors, or control module malfunctions.

10. How can regular maintenance help prevent the occurrence of OBDII code P303B in a Chevrolet Hybrid/EV?

Regular maintenance, including software updates and system checks, can help prevent issues like OBDII code P303B in a Chevrolet Hybrid/EV by ensuring the proper functioning of the hybrid/EV components.