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Re: engine light on and idling rough
What code(s) are coming up when scanned?
You said you changed "the" O2 sensor? I believe your vehicle has two O2 sensors. One is located upstream from the catalytic converter and the other is located downstream from it. Is it possible that you changed one and left the other?
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You can remove the negative (black) battery cable and re-set your service engine light or got to your local auto parts store and they can re-set your codes with their code-reader - as far as rough running, maybe some debris was allowed into your fuel tank and needs to be dissolved with a fuel system cleaner like Chevron Techron
you need someone to read the falt code that the check engine light is responding to,try a local auto parts store. Most will read the code for free. The code should correspond with the exact problem,good luck,Gary
It takes a Code Reader to clear the check engine light. If you have one just go to the menu and choose clear codes, and it will clear out all codes and the light should go out. However, if you do have codes stored on you computor, right them down and find out what they are for, they may be the reason the light is on. If you dont have a code reader, go to your local Auto Zone or Advance Auto Parts, or other parts store and they can read the code and clear them off you computor. Hope this was of help.
Hello! #1...I need to know if the Check engine Light is on...If it is, take the vehicle to an Auto Zone or Advanced Auto (any auto parts store) and they, for free will read the code/codes...send the trouble codes to me and I'll fix your Focus...#2 tell me which engine is in the car; give me the sub model ie...SE, ZTS....etc...If there isn't a CEL tell me....Guru...Saailer
If the "check engine" light came on, that's the starting point. The computer detected a problem and the "trouble code(s)' are stored in the computer. You will need an OBD II code reader to retrieve the code(s). Some auto parts stores do this for free. Since there is a whole series of codes, I can't guess as to what it is. If the store gives you the codes and not the meanings, just reply here and I can give you the definition.
This might sound like a simple answer, but the check engine light is turned on for hundreds of reasons,and the only way to figure out what it is , is to read the code with a OBD2 code reader. Most local auto parts stores, such as Autozone, will read your code for free, and tell you what might be causing the problem. Give it a shot, it might be an easy fix.
Hi, since the check engine light (CEL) is on you need to get the trouble codes read. Most auto parts stores will do this for free. If there isn't one nearby, any shop should be able to read it (for a charge) or you could buy your own code reader.