my check engine light just came on (about 45K miles) and I was wondering if the check engine light will come on when its time to do a regular maintenance (my honda civic does that, its check engine light is based on milage). If this is the case they will just reset it when I take it to the dealer for a oil change (due anyway) correct?
No, on the 2003 the CEL only lights up when the computer detects a problem. You can pull the diagnostic codes yourself with a relatively inexpensive OBDII scanner (or many auto parts places will pull the codes for your for free, in the hopes you'll buy the repair parts from them). Or you can have your friendly neighborhood trusted mechanic pull the code and fix the problem for ya.
Starting in 2004, the Camrys have an annoying "Maintenance Required" light that lights every 5000 miles, but that's separate from the CEL.
Andy Hill wrote:
if after telling you that there is no notieable changes to performance to the vehicle any ideas as to what it might be off the top of your head?
Based on absolutely nothing substantive, I would check to make sure the gas cap is on properly. Failure to do so has been known to cause CEL to illuminate.
Did it happen not long after you added fuel at a gas station ?
Justa Lurker wrote:
Well I gas up all the time, unfortunatly, and I can't remember. But i was wondering with that possiblity that maybe the computer can be reset by undoing the negative cable on the battery? Then if the light comes on again then I know I need to take it in. My wife could have not put it on right while being in a hurry one time (she has two screaming kids in the back seat). I am really suspect to this being nothing other than computer error, b/c we just bought the car in March and it was a certified used car (not that it means much) but the guy showed me the records that they had on maintinance for the car (told him I liked to do my own maintinance for what I could). If they ran in tests and spoke with the computer on the car something would have shown up then I think. But who knows if I reset the computer and the light comes back on I guess I will have to just take it in.
Another question: Does anyone know if any possible CEL are covered under the warrenty?
As mentioned, remove the gas cap and then tighten it down until it clicks several times. Each time you open it you should twist it closed until you hear the clicks.
There are any number of problems this could be and most of them would be covered under warranty. The O2 sensors are another common problem.
If, after two or three days, the light goes out and stays out, I wouldn't bother to have it checked. But, if in a few weeks it comes on again, and you have keep good seal on the gas cap I'd be inclined to have it checked somewhere -- ie -- pull the codes.
Sometimes the computer "sees" a little glitch. Then when it runs through the cycle again, whatever set off is gone never to return. However, if the light just stays on or goes off and comes back, then it's really time to investigate.