i recently bought a used Focus and today one of the headlights (low beam only, high beam works) went out. I changed it and it still didn't work so I went to check the fuses in the box next to the engine. One of them was blown so I figured that was the one for the dead light. And then I swapped the fuse with the one that looks exactly the same under it, and it worked! i then drove to the shop to buy new fuses without swapping it back. On my way to the shop, the check engine light came on. I thought nothing of it and figured that it would turn off once i replaced the fuse. but it didnt turn back off. so heres my question.could it be possible that the light came on because i pulled out that other fuse? if so then will it turn back off later on? i dont think that its a coincidence that i pulled a fuse and something is wrong with my engine. but i want to be sure because i dont have money to fix it. i searched the ford manual and the fuse i pulled might have been the o2 sensor?
Check engine light after changing fuses? 2000 Ford Focus SE?
Yes. The missing fuse caused a Diagnostic Trouble Code to set. There are tools that you can reset with, but if you don't want to pay the money, after 10 to 20 ignition cycles, it should reset itself provided the computer doesn't see another fault from that DTC.
Check engine light after changing fuses? 2000 Ford Focus SE?
check engine lights only come on for emission related problems by federal law after 1996, take it to autozone and they will scan it for free and tell you what the problem is it could be something as small as you left your gas cap loose but it's nothing to do with a fuse, they should give you a p code if it's a 44- code like p0440 it's evaporative emission control leak and it's the gas cap
i think you just triggered a check engine light on it,try removing the battery cable for about ten minutes and that should erase it,auto zone can also clear it off with a scanner ,but at this point all i think that happened was pulling the fuse triggered the light,it should return to normal once the other fuse is replaced,the car probably didn't drive any different even thought the check engine light was on so i think you should be ok on it this time,good luck on it.
You moved a blown fuse to another components fuse slot. Therefore you turned that component off. Your cars computer recognized that component not working when it did it's system check. When you put a new fuse back in, it fixed the problem. The check engine light will not go out until you clear the fault using a scanner. In the old days, or OBD1 you could disconnect the battery for a while and the code would erase. If you told me the fuse #, I could tell you what you temporarly turned off.
