Toyota Sienna P Codes (Powertrain) P0400 - P0499

My Check Engine Light Comes Once Every Month.the Code Is P0420.can I Test The Rear Cat By Checking The Inlet And Outlet Temp Of The...

I Failed My Emmisions Test. The Error Code Reads P0420: Catalyst System Efficiency Below Threshold (bank 1). I Have Been Told This Is O2...

I Have P0420, And The Original Ecm. If I Were To Go To A Junkyard Or Pick N Pull, How Would I Know If The Used Ecm Was One Of The Ones...

I Own A 2001 Toyota Sienna Xle Van. The Other Day I Backed My Van Up And I Must Have Backed Into A Snowbank, And I Believe I Got Snow In My...

Check Engine Light On For Awhile. One Mechanic Said We Needed A New Computer. However, Codes Were P0440,0441,0446 (emissions). Pulled A...