Owners Manual
Page 286
...error code in the emission control system, the malfunction indicator lamp comes on. Contact your vehicle may not pass the I/M test and need to service the vehicle. However, when the battery is disconnected or run down, the codes are taken. In this case, your Toyota... dealer to be repaired. Also, depending on your driving habits, the codes may not be cleared unless about 40 trips or more are erased. Also, if the malfunction... loose fuel tank cap, your vehicle may not pass the I/M test. 286 2003 MY SIENNA (OM45410U)
...error code in the emission control system, the malfunction indicator lamp comes on. Contact your vehicle may not pass the I/M test and need to service the vehicle. However, when the battery is disconnected or run down, the codes are taken. In this case, your Toyota... dealer to be repaired. Also, depending on your driving habits, the codes may not be cleared unless about 40 trips or more are erased. Also, if the malfunction... loose fuel tank cap, your vehicle may not pass the I/M test. 286 2003 MY SIENNA (OM45410U)