Question about 2002 Chevrolet Impala

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Change oil light stays on longer than usual

2002 Impala with 3.4L engine. Had the oil changed recently, but not due yet. All of a sudden it is down 1/2 litre of oil and the light stays on a long time after I start the car. It never used oil before and it isn't time to change - I can even smell a little oil in vehicle. It has been -45 degrees here .. very cold, could that have anything to do with it? help please?

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If the light came on almost immediately after the oil change it is very possible that the oil filter was incorrectly installed and not seated properly. This would be the most common problem if it occured almost immediately after the oil change, and you have never had this problem. It is very easy to do that is why when you are changing oil and putting the new filter back on it is vitally important to make sure that it is on properly. Once the filter is on the filter post you should actually be able to "spin" it fairly easily until it is all the way on. If it does not seem to go easily it is not properly seated.
what you are probably smelling is any oil coming out that may be making contact with hot engine parts. I can't be 100% certain that this is your problem but it is one possibility. The only way to correct this if it is your problem is to re-do the oil change, or at a minimum have the filter re-installed or a new one installed correctly. Make sure the oil afterwards is at the proper level because some is going to leak out when you take the filter off. Good luck

Posted on Feb 12, 2009

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It may be your oil pressure transmitter switch at fault. There's many different oil pressure transmitter switches. Here are some generic images:
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It could also be that your vehicle is due an oil/filter change.
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It's unlikely to be your oil pump at fault.
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