B156C 2017 Toyota RAV4 Code - Extension Module Disconnected

The code B156C indicates that the extension module in the vehicle is disconnected.

Common symptoms may include issues with the vehicle's infotainment system, loss of certain features, or dashboard warning lights related to the extension module.

The code B156C is typically triggered when there is a poor connection, wiring issue, or a faulty extension module in the vehicle.

Diagnosing this code may involve checking the connections to the extension module, inspecting the wiring for any damage, and using a diagnostic scanner to reset the code and see if it reoccurs.

While the vehicle may still be operable with this code, it is recommended to address the issue promptly to prevent any potential complications or further damage.

Repairing this code may range from simply reconnecting a loose connection to replacing a faulty extension module, depending on the underlying cause.

The cost of fixing this code can vary based on the specific repair needed, such as reconnecting wires, replacing components, or seeking professional diagnostic services.

While you can attempt to reset the code using a diagnostic scanner, it is important to address the root cause of the issue to prevent the code from reappearing.

It is advisable to check with Toyota or the National Highway Traffic Safety Administration (NHTSA) for any recalls or technical service bulletins related to this specific OBDII code.

Regularly inspecting and maintaining the vehicle's electrical connections, especially those related to the extension module, can help prevent issues that may trigger this code.