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Service bulletins for the 1999 Toyota Sienna

A bulletin is a manufacturer's communication to its dealers, as NHTSA indexes it. The summary is NHTSA's. The document is the manufacturer's: read it at NHTSA. A bulletin is not a recall, and listing a model year does not mean every vehicle of it is concerned.

101 on file from NHTSA, as of 2026-10-19.

By type

By component

By trouble code

Only bulletins with component: Engine are shown. Show all

Bulletins, newest first
T-TT-0010-10 Rev2018-04-02. Service bulletin. BACK OVER PREVENTION; ENGINE. Tech Tip: Low battery voltage can contribute to a MIL "ON" condition for P0335 (Crankshaft Position Sensor Circuit) and/or P0340 (Camshaft Position Sensor Circuit) due to inconsistent rotational speed of the engine's crankshaft.
46122005-08-04. Service bulletin. ENGINE AND ENGINE COOLING. DIAGNOSTIC - ENGINE REPAIR MANUAL CORRECTION. 00400-RM657-U. *TT
037042004-11-03. Service bulletin. ENGINE AND ENGINE COOLING:ENGINE. ENGINE BANK 1 AND BANK 2 A/F AND 02 IDENTIFICATION. VARIOUS TOYOTA MODELS. *TT
008042004-05-26. Service bulletin. ENGINE AND ENGINE COOLING:ENGINE. MALFUNCTION INDICATOR LAMP ON 1MZ-FE ENGINE MISFIRE DIAGNOSTIC TROUBLE CODE (DTC) P0300, P0301, P0302, P0303, P0304, P0305 OR P0306. *TT
TC020022002-03-19. Service bulletin. ENGINE AND ENGINE COOLING:ENGINE:GASOLINE. SPECIAL POLICY ADJUSTMENT REGARDING VEHICLES EXPERIENCING ENGINE OIL GELLING OR SLUDGE. *TT
EG013992000-04-14. Service bulletin. ENGINE AND ENGINE COOLING:ENGINE:GASOLINE. SOME VEHICLES MAY EXHIBIT A ROUGH IDLE, AND OR A MALFUNCTION INDICATOR LIGHT ON CONDITION IN WHICH A SINGLE CYLINDER MISFIRE CODE, OR CODES ARE PRESENT. *TT
EG001002000-04-14. Service bulletin. ENGINE AND ENGINE COOLING:ENGINE:GASOLINE. SOME CALIFORNIA EMISSION SPECIFICATION VEHICLES MAY EXHIBIT A ROUGH IDLE AND OR A MIL ON CONDITION IN WHICH A SINGLE CYLINDER MISFIRE CODE OR CODES ARE PRESENT. *TT
EG002991999-08-12. Service bulletin. ENGINE AND ENGINE COOLING:ENGINE:GASOLINE. REVISED INFORMATION TO ASSIST IN THE DIAGNOSIS OF DIAGNOSTIC TROUBLE CODE P0420 INDICATING A POSSIBLE CATALYST SYSTEM EFFICIENCY BELOW THRESHOLD CONDITION. *TT
EG002991999-05-11. Service bulletin. ENGINE AND ENGINE COOLING:ENGINE:GASOLINE. SOME VEHICLES MAY EXHIBIT DIAGNOSTIC TROUBLE CODE P0420 INDICATING A POSSIBLE CATALYST SYSTEM EFFICIENCY BELOW THRESHOLD CONDITION. *TT

The summaries are NHTSA's. Each bulletin's page links NHTSA's copy of the manufacturer's document.