To reset the ECU in a Honda Civic You'll first want to warm the engine. Drive around so that You will not be doing a cold start. Turn off the car and disconnect the battery. You can also opt to pull the ECU fuse which is located under the hood in the engine compartment fuse box. Reinsert the fuse and start the car making sure to close the hood. Allow the car to idle for at least 10 minutes. Do not touch the gas nor brake pedals. All accessories should also be off. Turn the car off and back on again then drive for the computer to relearn the fuel trim.
Joshua S.
April 9, 2020
To reset the computer in a honda civic you will need to disconnect the battery for about 10 minutes.
Joey d
October 25, 2022
Pull the ECU fuse out and put it back in then let your car idle for at least ten minutes turn all accessories off and don’t touch the brake or the gas pedal after that turn it off then turn it back on then ride aroun for a little bit until the ECU will reset it self
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