1998 Toyota Sienna with 209K miles recently needed its emissions tested. When i took the vehicle into get tested it passed the emissions portion but failed the test because of the check engine light. Took the van in to get an O2 sensor replaced and check engine light was turned off and everything …

1998 Toyota Sienna Drive cycles

JoeMario September 10, 2013, 2:24pm 3

And if you’re interested in all the gory details, here’s a Toyota TSB for all 1996-2002 Toyotas, titled “READINESS MONITOR DRIVE PATTERNS”.