Clearing Diagnostic Codes W/O Reader
If you have a diagnostic code that popped up due to disconnecting your O2 sensors or if any sensor errored out the following method will clear those codes.
Perform the following steps EXACTLY to reboot the ECU.
(1) Turn off the ignition for 15 seconds.
(2) Turn the ignition on/off for 5 cycles. Make sure each cycle lasts about ½ second, verifying the start of the fuel pump for each cycle. If the fuel pump doesn't start during any cycle, begin the entire reboot procedure from the beginning.
(3) Turn off the ignition for 15 seconds.
(4) Wipe the sweat from your brow and have a beer, You cleared the codes.