AutoCodes – Toyota – B156C 2018 Toyota RAV4

B156C 2018 Toyota RAV4 Code - Extension Module Disconnected

Quick Answer

The Stereo Component Tuner Assembly and the Radio and Display Receiver Assembly (or Navigation Receiver Assembly) are connected by the USB communication line. Common causes include Faulty Radio and Display Receiver Assembly (or Navigation Receiver Assembly), Faulty Stereo Component Tuner Assembly, Radio and Display Receiver Assembly 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: B156C 2018 Toyota RAV4 indicates Extension Module Disconnected.
Common causes: Common causes include Faulty Radio and Display Receiver Assembly (or Navigation Receiver Assembly), Faulty Stereo Component Tuner Assembly, Radio and Display Receiver Assembly 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 273

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 Mar 25, 2024

Description
Possible Causes
How To Fix
Cost to Diagnose
FAQs
Comments
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Code B156C 2018 Toyota RAV4 Description

The Stereo Component Tuner Assembly and the Radio and Display Receiver Assembly (or Navigation Receiver Assembly) are connected by the USB communication line. When an USB communication error occurs between the Stereo Component Tuner Assembly and the Radio and Display Receiver Assembly (or Navigation Receiver Assembly), this Diagnostic Trouble Code (DTC) will be stored.

OBDII Code B156C 2018 Toyota RAV4 - Extension Module Disconnected - AutoCodes.com — B156C 2018 Toyota RAV4 Code - Extension Module Disconnected

What does this mean?

What are the Possible Causes of the DTC B156C 2018 Toyota RAV4?

Faulty Radio and Display Receiver Assembly (or Navigation Receiver Assembly)
Faulty Stereo Component Tuner Assembly
Radio and Display Receiver Assembly harness is open or shorted
Radio and Display Receiver Assembly circuit poor electrical connection

How to Fix the DTC B156C 2018 Toyota RAV4?

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 B156C 2018 Toyota RAV4 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 B156C 2018 Toyota RAV4 code?

Need more information on how to fix the B156C 2018 Toyota RAV4 code? Get Access to Factory Service Manuals

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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 B156C 2018 Toyota RAV4 Code

1. What does the OBDII code B156C in a 2018 Toyota RAV4 indicate?

The code B156C in a 2018 Toyota RAV4 points to an issue with the Extension Module Disconnected.

2. What are the common symptoms of OBDII code B156C in a 2018 Toyota RAV4?

Common symptoms include warning lights on the dashboard, loss of functionality of certain vehicle features, and potential communication errors with diagnostic tools.

3. What could cause the Extension Module Disconnected code B156C in a 2018 Toyota RAV4?

Possible causes of this code include a loose connection, damaged wiring, a faulty extension module, or issues with the vehicle's electronic control unit (ECU).

4. How can I diagnose the OBDII code B156C in my 2018 Toyota RAV4?

Diagnosing this code typically involves checking the connections and wiring related to the extension module, inspecting for physical damage, and using a diagnostic tool to communicate with the vehicle's systems.

5. Is it safe to continue driving with the OBDII code B156C in a 2018 Toyota RAV4?

It is generally not recommended to drive with this code present, as it may lead to further electrical issues or malfunctions in the vehicle.

6. Can I reset the B156C code in my 2018 Toyota RAV4 by disconnecting the battery?

While disconnecting the battery may reset the code temporarily, it is important to address the underlying issue causing the code to prevent it from reoccurring.

7. How much does it typically cost to repair the Extension Module Disconnected code B156C in a 2018 Toyota RAV4?

The cost of repair can vary depending on the exact cause of the issue, but it may involve repairing or replacing wiring, connectors, or the extension module itself.

8. Are there any DIY tips for fixing the OBDII code B156C in a 2018 Toyota RAV4?

DIY tips may include checking and securing connections, inspecting wiring for damage, and ensuring the extension module is properly seated and functioning.

9. Can a mechanic easily fix the B156C code in a 2018 Toyota RAV4?

A qualified mechanic with experience in diagnosing electrical issues should be able to efficiently identify and address the problem causing the B156C code in a 2018 Toyota RAV4.

10. How important is it to address the OBDII code B156C promptly in a 2018 Toyota RAV4?

It is crucial to address this code promptly to prevent further electrical issues, potential safety hazards, and to ensure the proper functioning of your vehicle's systems.