Without Scan Tool
Clearing Codes:
1. Turn ignition off.
2. Remove EFI 15A fuse for 10 to 15 seconds.
3. Replace fuse.
Another way is to disconnect the negative (-) battery cable. However, removal of the negative (-) battery cable will erase memory in the clock and/or radio, so removal of the EFI F-HTR fuse is preferred.
NOTE: Codes can also be erased by battery disconnection, but all vehicle memories will be reset (i.e. radio, clock etc.).