AutoCodes – Generic – B2806

B2806 Code - Engine Control Module Abnormal

Quick Answer

The Diagnostic Trouble Code (DTC) sets when cruise indicator illumination request from Engine Control Module (ECM) and ON/OFF information of cruise function do not match. Common causes include Faulty Engine Control Module (ECM), Engine Control Module (ECM) harness is open or shorted, Engine Control Module (ECM) 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: B2806 indicates Engine Control Module Abnormal.
Common causes: Common causes include Faulty Engine Control Module (ECM), Engine Control Module (ECM) harness is open or shorted, Engine Control Module (ECM) 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 3,975

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 Feb 11, 2020

Description
Possible Causes
How To Fix
Cost to Diagnose
FAQs
Comments
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Code B2806 Description

The Diagnostic Trouble Code (DTC) sets when cruise indicator illumination request from Engine Control Module (ECM) and ON/OFF information of cruise function do not match.

OBDII Code B2806 - Engine Control Module Abnormal - AutoCodes.com — B2806 Code - Engine Control Module Abnormal

What does this mean?

What are the Possible Causes of the DTC B2806?

Faulty Engine Control Module (ECM)
Engine Control Module (ECM) harness is open or shorted
Engine Control Module (ECM) circuit poor electrical connection

How to Fix the DTC B2806?

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 B2806 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 B2806 code?

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Need Help with the Code?

Get the B2806 code diagnosed by a professional: Find a repair shop in your area

Information for Specific Makes

B2806 Subaru — Engine Control Module Abnormal

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 B2806 Code

1. What are the common symptoms of OBDII code B2806 (Engine Control Module Abnormal)?

- Common symptoms include the Check Engine Light being illuminated, engine performance issues, and potential stalling or rough idling.

2. What are the possible causes of OBDII code B2806?

- Possible causes include a faulty engine control module (ECM), wiring issues, poor electrical connections, or a software-related problem.

3. How can I diagnose OBDII code B2806?

- Diagnosing this code typically involves using an OBDII scanner to retrieve the specific fault code, checking the ECM for any visible damage, and conducting a thorough inspection of related wiring and connectors.

4. Can I continue driving my vehicle with OBDII code B2806?

- It is not recommended to continue driving your vehicle with this code present, as it can lead to potential engine performance issues and further damage.

5. What are the repair options for OBDII code B2806?

- Repair options may include replacing the faulty ECM, repairing or replacing damaged wiring, ensuring proper electrical connections, and updating the ECM software if necessary.

6. Is it safe to reset the OBDII code B2806 and see if it comes back?

- While resetting the code may temporarily turn off the Check Engine Light, it is important to diagnose and address the underlying issue causing the code to prevent potential long-term damage.

7. Can a DIY enthusiast fix OBDII code B2806 at home?

- Depending on the specific cause of the code, some DIY enthusiasts may be able to address the issue at home by replacing components like the ECM or repairing wiring. However, proper diagnosis and repair knowledge are crucial.

8. How much does it typically cost to repair OBDII code B2806?

- The cost of repairing this code can vary depending on the specific cause, the need for parts replacement, and labor costs. It is advisable to consult a professional mechanic for an accurate estimate.

9. Are there any preventive measures to avoid OBDII code B2806 in the future?

- Regular maintenance, including checking and maintaining the health of the ECM, wiring, and electrical connections, can help prevent issues that may trigger OBDII code B2806.

10. Can a faulty battery or alternator trigger OBDII code B2806?

- A faulty battery or alternator may indirectly contribute to electrical issues that could trigger OBDII code B2806. It is essential to ensure the proper functioning of all electrical components in the vehicle.