Vehicle Questions and Answers
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If you want to turn off the engine management light on your Ford Focus, the first thing to try is to repeatedly turn the vehicle on and off. Insert the key in the ignition, turn it from off to the run position, wait a couple of seconds, and repeat this three times. If that doesn't work, perform a factory reset by disconnecting the battery for about 20 minutes. Reconnect it, and the light should definitely go away.
Does this not clean the radio?
Typically, I remove the battery for around 20 seconds.
To clear the check engine light, you can disconnect the car battery and allow it to completely power off. Another option is to use an engine diagnostic tool to determine the issue.