Toyota 30CL0301.cuw Firmware for 2014 Tundra

30CL0301.cuw is an engine control calibration associated with the 2014 Toyota Tundra. Toyota service bulletin T-SB-0146-16 lists calibration ID 30CL0301 as an updated calibration in connection with diagnostic trouble code P2610 and the malfunction indicator light.

What the calibration controls

The engine control module manages engine operation using sensor inputs and programmed calibration data. It also monitors its own functions and can turn on the malfunction indicator light when it detects a fault relevant to emissions or engine management.

P2610 concerns the engine control module’s internal engine-off timer. That timer tracks the period after the engine is switched off, information the controller can use when managing diagnostic routines. A P2610 fault can illuminate the check engine light even though the code itself points to a controller timing function rather than a specific mechanical engine component.

Service bulletin context

Toyota identifies 30CL0301 as an updated calibration in T-SB-0146-16, released in October 2016. The bulletin connects the update with a malfunction indicator light and P2610 on the 2014 Tundra. This establishes the calibration’s service context, but it does not mean every illuminated check engine light on that model is caused by the same condition.

The complete calibration ID matters when comparing a vehicle’s software with service information. A similar-looking identifier is not enough to establish that it is the same calibration or that it applies to a particular truck.