Review Of 2013 Ford Focus St Check Engine Light 2023. All ive done to the car is a muffler delete. Ford check engine light will turn on when you turn on the ignition under normal operation but should turn off and stay off once you start the engine.
Is it ok to drive with a check engine light on? The car was running fine so he cleared the code and said if it returns call them. After searching around the forums there seems to be a fix with a map sensor harness:
