You can get ANY sort of code if the ECM gets confused. And that's exactly what's happening here. That TSB clearly states that it is OBSOLETE. This TSB has been replaced by Special Service Campaign 60I (apparently that's an "i", not a one). Basically, there is a problem with the ECM's firmware, and it needs to be updated to correct the problem. You need to visit your dealer, and have them look up Special Service Campaign 60I on TIS. Once the update has been performed, a sticker will be applied to the underside of the hood, which gives the details of the modifications.
Originally Posted By: DBMaster
OK, I'll be a pain - just a bit. Two of you said I could not get a P0430 on this engine because it's a 4 and not a V6. That seemed logical to me, however, this TSB states that you CAN get both codes on the 4.
Originally Posted By: The Critic
You should always check for any applicable TSBs before jumping to conclusions. There's an updated ECM calibration available to address the P0420 code on this car: http://www.toyotapart.com/ECM_CALIBRATION_UPDATE_M.I.L._ON_DTC_PO420_AND_OR_PO430_T-EG041-05.pdf However, at 150k, there's a good chance that it needs a CAT anyway, but the updated calibration is worth a shot and should still be loaded, IMO.