Check Engine Light Enigma Car Runs Smoothly, Leaving Drivers Puzzled

If it's 'on' steadily, it could be serious, but likely not. I've had mine come on twice in 5k miles. If you let your car idle for more than 10 ... Born in Texas but lived in Ohio most my life...I still think I ... Thanks...not my daily driver so I parked it and went back to the car. A check engine light usually means a sensor failed with the emissions system or something has gone wrong, and it was flagged. Yeah, the car can run fine. Common causes in a Ford include everything from a simple gas cap problem all the way to blown spark plugs, but in all cases, it should not go ignored. The Check Engine light means the engine management computer has detected a fault and recorder a trouble code. It could be just a fluke, or a sensor going bad ... pull the negative terminal out of the battery and open the driver side door for 10min so it releases any charge left in the system. Then put the ... Bad Ground or positive wire connections · Faulty starter motor – too much current draw · Weak battery or parasitic draw pulling battery down ... Is constantly on: This means the onboard diagnostic system has detected an issue that needs to be fixed. While you can still drive your car and it may seem to ... The dreaded check engine light comes on while you are driving only to signify that there is a problem. The specific error or failing part could be one of many ... Spark plug/ignition coil issues: Faulty spark plugs or coils can cause engine misfires, rough idling, and trigger the "check engine" dashboard light. The ...