Clearing Trouble Codes

WARNING: This page is about a different car, the 1989 Toyota Corolla. However, it is still accessible from the selected car via links, so may be relevant.

After repairs are performed, clear ECU memory of all stored trouble codes. To clear memory, turn ignition off and remove STOP 15 Amp fuse from fuse block for 30 seconds or more.
Fuse may require to be removed longer depending on the ambient temperature. Replace fuse and exit diagnostic mode. Trouble codes can also be cleared by disconnecting vehicle battery. However, other memory functions (clock, radio, etc.), will need to be reset.