AutoCodes – Generic – B278D

B278D Code - Malfunction of ID-BOX Recognition

Quick Answer

When the Certification ECU (Smart Key ECU Assembly) detects an input signal indicating that the vehicle is equipped with an ID code box (Immobiliser code ECU) even though the ID code box (Immobiliser code ECU) is not registered, the Certification ECU (Smart Key ECU Assembly) stores this Diagnostic Trouble Code (DTC). Common causes include Misconnection of the ID code box (Immobiliser code 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: B278D indicates Malfunction of ID-BOX Recognition.
Common causes: Common causes include Misconnection of the ID code box (Immobiliser code 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 4,680

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 Jan 16, 2023

Description
Possible Causes
How To Fix
Cost to Diagnose
FAQs
Comments
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Code B278D Description

OBDII Code B278D - Malfunction of ID-BOX Recognition - AutoCodes.com — B278D Code - Malfunction of ID-BOX Recognition

What does this mean?

What are the Possible Causes of the DTC B278D?

Misconnection of the ID code box (Immobiliser code ECU)

How to Fix the DTC B278D?

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 B278D 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 B278D code?

Need more information on how to fix the B278D code? Get Access to Factory Service Manuals

Need Help with the Code?

Get the B278D code diagnosed by a professional: Find a repair shop in your area

Information for Specific Makes

B278D Lexus — Malfunction of ID-BOX Recognition
B278D Nissan — Electric Compressor Communication Error
B278D Scion — Malfunction of ID-BOX Recognition
B278D Toyota — Malfunction of ID-BOX Recognition

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 B278D Code

1. What are the common symptoms of OBDII code B278D related to the malfunction of ID-BOX recognition?

The common symptoms include difficulty starting the vehicle, intermittent stalling, and issues with the vehicle's anti-theft system.

2. What are some possible causes of OBDII code B278D?

Possible causes of this code include a faulty ID-BOX module, wiring issues, a defective key fob, or problems with the vehicle's immobilizer system.

3. How can I diagnose the malfunction of ID-BOX recognition causing OBDII code B278D?

Diagnosis typically involves using a diagnostic scan tool to retrieve the code, checking the ID-BOX module and related wiring for faults, and testing the key fob and immobilizer system for proper functionality.

4. What are the recommended repair tips for resolving OBDII code B278D?

Repair tips may include replacing the faulty ID-BOX module, repairing any damaged wiring, reprogramming the key fob, or resetting the vehicle's immobilizer system.

5. Can I drive my vehicle with OBDII code B278D triggered?

It is not recommended to drive the vehicle with this code triggered, as it can lead to potential starting or stalling issues, and may affect the vehicle's anti-theft system.

6. How much does it typically cost to repair OBDII code B278D related to ID-BOX recognition malfunction?

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

7. Are there any preventive measures to avoid OBDII code B278D in the future?

Regularly checking and maintaining the key fob, ID-BOX module, and immobilizer system can help prevent issues that may trigger code B278D in the future.

8. Can a DIY enthusiast fix OBDII code B278D at home?

While some basic diagnostics and repairs may be possible for DIY enthusiasts, resolving OBDII code B278D related to ID-BOX recognition malfunction often requires specialized tools and expertise, so professional assistance may be necessary.

9. How long does it typically take to repair OBDII code B278D?

The repair time can vary depending on the exact cause of the issue and the complexity of the repair, but it may take a few hours to a full day to diagnose and resolve the problem.

10. Is OBDII code B278D a common issue in certain vehicle models?

This code may be more common in vehicles equipped with advanced anti-theft systems that rely on ID-BOX recognition technology, but it can potentially occur in any vehicle with similar components.