Toyota Tacoma P0240 air leak issue before O2 sensor 2, recurring despite previous repairs on Toyota Tacoma

Some Toyota Tacoma owners report experiencing recurring P0240 error codes, which indicate issues with the Turbocharger Boost Sensor B Circuit. These owners have noted that exhaust leaks located post-catalytic converter but pre-secondary O2 sensor can negatively impact sensor readings, leading to this error code. Additionally, air leaks in the air induction system, intake manifold, or exhaust components have been identified as potential causes for triggering the P0240 code. Vacuum leaks in the air intake or exhaust lines before the O2 sensor can also contribute to these issues. Furthermore, a faulty engine temperature sensor may disrupt the fuel mixture, resulting in inaccurate sensor readings. While the P0240 code is specific to the turbocharger boost sensor, some owners have found that problems with the catalytic converter can lead to similar error codes, such as P0420. A systematic diagnostic approach, starting with checking for other codes, is recommended to help identify the underlying cause of the recurring P0240 issue in the Toyota Tacoma.