Toyota 302D2000.cuw Engine Control Calibration
Learn how Toyota calibration 302D2000 relates to engine control and a P0456 evaporative emissions service bulletin.
302D2000.cuw is a Toyota engine control calibration associated with a service bulletin for a P0456 evaporative emissions fault. The engine control module manages engine operation and runs emissions diagnostics. In this case, the relevant diagnostic monitors the fuel vapor containment system for a very small leak.
What P0456 means in practice
The evaporative emissions system keeps fuel vapors from escaping into the atmosphere and routes them to the engine to be burned. A P0456 code indicates that the diagnostic has detected a very small leak in that system. The malfunction indicator light may illuminate, even though the driver may not notice a change in how the vehicle drives.
Possible causes of a small-leak code include a fuel cap that does not seal properly or a leak elsewhere in the vapor system. The code identifies the type of fault detected, not the exact component responsible.
How 302D2000 appears in Toyota service records
Toyota Service Bulletin T-SB-0235-09 lists 302D2000 as a previous calibration in connection with a malfunction indicator light and P0456. The bulletin covers certain 2005–2008 Toyota Corolla and Matrix vehicles. That model range is the bulletin’s scope, not a guarantee that this calibration applies to every vehicle listed.
The distinction matters: 302D2000 is the earlier calibration in the service record, not the revision discussed to address the bulletin condition. The record connects it to the P0456 service topic, but does not establish every function or change contained in this particular calibration.