AutoCodes – GMC – P303E GMC

P303E GMC Code - Hybrid/EV Battery Interface Control Module 12 Long Term Memory Performance

Quick Answer

The Hybrid/EV Battery Interface Control Module will diagnose its own systems and determine when a fault condition is present. Common causes include 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. 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: P303E GMC indicates Hybrid/EV Battery Interface Control Module 12 Long Term Memory Performance.
Common causes: Common causes include 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.
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 863

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 P303E GMC Description

The Hybrid/EV Battery Interface Control Module will diagnose its own systems and determine when a fault condition is present. This diagnostic applies to internal microprocessor integrity conditions within the Hybrid/EV Battery Interface Control Module. This fault is internal to the Hybrid/EV Battery Interface Control Module and no external circuits are involved.

OBDII Code P303E GMC - Hybrid/EV Battery Interface Control Module 12 Long Term Memory Performance - AutoCodes.com — P303E GMC Code - Hybrid/EV Battery Interface Control Module 12 Long Term Memory Performance

What does this mean?

What are the Possible Causes of the DTC P303E GMC?

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 P303E GMC?

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 P303E GMC 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 P303E GMC Code

1. What are common symptoms of OBDII code P303E in a GMC Hybrid/EV vehicle?

The common symptoms include poor fuel efficiency, difficulty starting the vehicle, reduced engine performance, and an illuminated check engine light.

2. What does the OBDII code P303E in a GMC Hybrid/EV vehicle indicate?

This code specifically points to an issue with the Hybrid/EV Battery Interface Control Module 12 Long Term Memory Performance.

3. What are possible causes of OBDII code P303E appearing in a GMC Hybrid/EV vehicle?

Possible causes include a faulty Hybrid/EV Battery Interface Control Module, wiring issues, software glitches, or a malfunctioning battery pack.

4. How can I diagnose the OBDII code P303E in my GMC Hybrid/EV vehicle?

Diagnosing this code typically involves using a professional OBDII scanner to read the code, checking for any other related codes, and inspecting the battery interface control module and its connections.

5. Is it safe to continue driving with OBDII code P303E in my GMC Hybrid/EV vehicle?

It is not recommended to continue driving with this code present, as it can lead to further damage to the hybrid components and reduce the vehicle's overall performance.

6. Can I reset OBDII code P303E in my GMC Hybrid/EV vehicle myself?

While you can clear the code with an OBDII scanner, it is important to address the underlying issue causing the code to prevent it from reoccurring.

7. What are some repair tips for fixing OBDII code P303E in a GMC Hybrid/EV vehicle?

Repair tips may include checking and repairing any wiring issues, updating the control module software, or replacing the battery interface control module if necessary.

8. How much does it typically cost to repair OBDII code P303E in a GMC Hybrid/EV vehicle?

The cost of repair can vary depending on the exact cause of the code, but it may range from a few hundred to over a thousand dollars, including parts and labor.

9. Can I prevent OBDII code P303E from appearing in my GMC Hybrid/EV vehicle?

Regular maintenance, including checking the hybrid components and ensuring proper connections, can help prevent this code from appearing due to underlying issues.

10. Is OBDII code P303E specific to GMC Hybrid/EV vehicles, or can it appear in other makes and models?

While this code is specific to GMC vehicles with hybrid or electric systems, similar codes related to battery control modules may appear in other hybrid or electric vehicles from different manufacturers.