Toyota 30CK0600.cuw Engine Control Calibration

30CK0600.cuw is a Toyota engine control calibration listed as an updated calibration in service bulletin T-SB-0166-19. It belongs to the engine control module, which manages engine operation and monitors conditions that can turn on the malfunction indicator light.

What the calibration controls

The engine control module uses sensor readings to regulate functions such as fuel delivery and ignition. It also checks whether the air-fuel mixture and other monitored systems are operating within expected limits. When it detects a relevant fault, it can store a diagnostic trouble code and illuminate the check engine light.

The bulletin associates calibration 30CK0600 with diagnostic codes P0171, P0172, P0174, P0175 and P1604. The P0171 and P0174 codes indicate lean conditions on the respective engine banks, while P0172 and P0175 indicate rich conditions. P1604 relates to a starting condition. These codes give a technician direction for diagnosis, but a stored code alone does not identify the failed part.

Bulletin context

Toyota lists 30CK0600 as an updated calibration in T-SB-0166-19, a bulletin concerning the malfunction indicator light. The bulletin’s vehicle scope includes the 2009 Toyota Sequoia and Tundra and the 2010–2018 Sequoia. That scope does not establish that this exact calibration applies to every vehicle listed.

The record identifies the calibration’s role in the bulletin, but it does not describe the precise software changes made by this revision. The controller’s general responsibilities should therefore be distinguished from any specific correction introduced by 30CK0600.