B156C 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 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.
Code B156C Description
What are the Possible Causes of the DTC B156C?
- 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?
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 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 code?
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Get the B156C code diagnosed by a professional: Find a repair shop in your area
Information for Specific Makes
- B156C Lexus — Extension Module Disconnected
- B156C Scion — Extension Module Disconnected
- B156C Toyota — Extension Module Disconnected
Frequently Asked Questions about B156C Code
1. What are the common symptoms of OBDII code B156C (Extension Module Disconnected)?
- The common symptoms include the malfunction indicator light (MIL) or check engine light turning on, issues with the vehicle's electrical systems, and possible communication problems with diagnostic tools.
2. What could cause the OBDII code B156C to trigger?
- The code B156C is typically triggered when the extension module, which is a component of the vehicle's electronic system, becomes disconnected or encounters a fault.
3. How serious is the OBDII code B156C (Extension Module Disconnected)?
- The severity of this code can vary depending on the specific vehicle and how it impacts the electronic systems. While it may not directly affect drivability, it is important to address the issue to ensure proper functionality.
4. Can I continue driving my vehicle with the OBDII code B156C present?
- It is generally safe to drive the vehicle with this code present, but it is recommended to have the issue diagnosed and repaired as soon as possible to prevent any potential electrical system problems.
5. What are some potential repair tips for resolving OBDII code B156C?
- Common repair tips include checking the connections and wiring related to the extension module, ensuring proper grounding, and inspecting for any signs of damage or corrosion.
6. How can I diagnose the cause of OBDII code B156C at home?
- While diagnosing the specific cause may require advanced diagnostic tools, you can start by visually inspecting the extension module connections, checking for loose or damaged wiring, and ensuring all related components are securely in place.
7. Is it necessary to reset the OBDII code B156C after making repairs?
- Yes, it is recommended to clear the code using an OBDII scanner after making necessary repairs to reset the system and see if the issue has been successfully resolved.
8. Are there any recalls or technical service bulletins related to OBDII code B156C?
- It is advisable to check with the vehicle manufacturer or authorized service centers for any related recalls or technical service bulletins that may provide additional guidance on addressing this specific code.
9. Can a DIY enthusiast without advanced automotive knowledge fix OBDII code B156C?
- While some basic troubleshooting and repair steps can be attempted by a DIY enthusiast, diagnosing and fixing the root cause of code B156C may require professional expertise and specialized tools.
10. How much does it typically cost to repair OBDII code B156C through a mechanic?
- The cost of repairing OBDII code B156C can vary depending on the labor rates, parts needed, and the specific cause of the issue. It is recommended to get a diagnostic assessment from a mechanic to determine the exact cost.
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