Add it yourself...
fix your Toyota Sienna Oxygen Sensor Malfunction P0420 P04305 - Catalyst Not working.http://www.findonefindall.com/toyota-sienna/toyota_oxygen_sensor.htm
Change PCV valvehttp://www.lexusownersclub.co.uk/knowledge/index.php?page=index_v2&id=181&c=7
Oxygen Sensor Replacementhttp://www.clublexus.com/forums/showthread.php?t=141875
remove an Oxygen sensorhttp://free-auto-repair-advice.blogspot.com/2007/07/how-to-remove-oxygen-sensor.html
Vacuum Hose Replacementhttp://www.cygnusx1.net/Supra/TechTips/vacuum_hose.aspx
What Are 02 Sensors and What do they do?http://my.is/forums/f67/what-02-sensors-what-do-they-do-341415/
Tune Up My Car or Truck Information Car Repairhttp://www.2carpros.com/how_to/how_to_tune_up.htm
PCV valvehttp://groups.msn.com/Sorensonbrian/yourwebpage.msnw
Vacuum Gauge Readingshttp://www.cygnusx1.net/Supra/TechTips/vacuum_gauge_readings.aspx
EGR removal - 83 2F desmoghttp://www.ih8mud.com/tech/2f-egr.php
Oxygen Sensor Replacementhttp://www.mr2garage.com/mr2-knowledgebase/oxygen+sensor+replacement.html
MkII O2 Sensor Diagnosishttp://www.mr2.com/TEXT/MkII_O2_Sensor.html
1993 Toyota MR2 M - VACUUM DIAGRAMShttp://www.ebooksquad.com/2007/09/08/1993-toyota-mr2-m-vacuum-diagrams.html
Blocking off EGR Valvehttp://www.toyotasurf.asn.au/techsite/egr.htm
Resetting your Air/Fuel Mixture Ratiohttp://www.6gc.net/howto/reset_your_air_fuel_ratio
Checking your O2 sensorhttp://www.imoc.co.uk/forums/kb.php?mode=article&k=33
How to Replace the Sub Oxygen Sensorshttp://www.lexls.com/tutorials/EFI/suboxygensensor.html
Changing Your 02 Sensorshttp://www.4runners.org/writeups/02sensor/index.html
Oxygen Sensor Test - Faqhttp://www.ttora.com/wiki/index.php/Oxygen_Sensor_Test
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