Rep Power: 0

Just a few days ago I bought a 2003 Civic LX, though before buying I asked about the front passenger side window, which wasn't working, and the seller agreed to have it fixed by his mechanic. I was told that it involved replacing a switch. A couple days later we complete the transaction, and the window works fine, but upon getting home I notice that the interior light doesn't come on when the door is opened -- the light itself works, as I can switch it on manually, but it doesn't respond to the door. (It was daytime when I first say the car, so I unfortunately didn't notice whether the light came on or not prior to the mechanic working on the door.) At this point I sort of shrug it off. Then another issue comes up when I'm driving to work the next day, and I notice that my 1/4 to 1/3 of a tank is suddenly reading out as nearly empty, and the fuel light comes on. I've read elsewhere on this forum that this is known to happen to Civics of this era (fuel sending unit perhaps?). The gauge later stabilized, and with a fuller tank I haven't had an issue yet. Around the same time the gauge was being wacky, though, the 'malfunction' light came on, and has stayed on the last day or so.

I guess my main question before taking this up with the seller (though he doesn't technically owe me anything it could be worth a shot), or going to a mechanic, is whether some or all of these issues are likely to be related. Could bad wiring done when repairing the door explain not only the interior light, but the malfunction light, or funky fuel gauge? (And how urgent does any of this sound as far as potential damage to the car?) So far the car seems to run great... I really appreciate any help on this!

 
Rep Power: 517

See what fault codes are stored.

Set the switch in the correct position (DOOR) and see if it will come on when any other doors are opened.

 
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Regarding doors, no, the light does not come on when any of the doors are opened in the door setting. As for fault codes, I'm afraid I'm not that tech savvy. I may be able to get some help from a friend on that. What would I be looking for there? As for fault codes, I'm afraid I'm not that tech savvy. I may be able to get some help from a friend on that. What would I be looking for there?

 
Rep Power: 173

You can get the computer scanned for free at most auto parts stores. Autozone definitely does this.

 
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Thanks, good to know. I have an Advance Auto Parts nearby..

 
Rep Power: 173

They should do it too! Don't let them sell you anything until you look up the codes though

 
Rep Power: 517

Get the actual code numbers, not just their description and parts shopping list.

 
Rep Power: 0

OK, thanks guys. I'll go by there tomorrow and try to get the actual codes..

 
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So it turned out to be a P1457 - EVAP emission control system leak. I've been told that could mean a number of things.. Could it be as minor as not tightening the gas cap well enough? I cleared the code, so now to see if it comes back or not..

 
Rep Power: 173

Sounds like a good plan to me!

 
Rep Power: 517

And now we know the check engine light is unrelated to the dome lights issue.

 
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Good point. OK, thanks again for the tips everyone. So far so good on the malfunction light (and the fuel gauge issue). I'll update as needed.