you have the engine on ---- engines have been known to use gas! If the mileage has gone down the things to check include tune up, air filter, sensor plroblems, injector problems.....
check coolant level
check the tail light bulbs
You could have many things causing this. I would first check fuel pressure. You should also replace your fuel filter if you havent already done this. I hope this helps as it could be many other things.
Park
A lot of things could be causing that. First did you check your coolant?
It should have fluid check/fill plugs on each cover.It should have fluid check/fill plugs on each cover.
Yo can not "change" an engine code. You need to repair what is causing the code.Yo can not "change" an engine code. You need to repair what is causing the code.
It should come on for a three second bulb check and then go out.
Check the sparkplugs. If they are fine it should be your oxgen sensor.
Check output of alternator--with engine running vots should be 13.8-14.2 Check with a voltmeter
It could be one of two things. Check all your doors to make sure they are closing properly. if so then check the switches. it should either be a pin swith somewhere in the door jamb of it might be inside the door where the latch is
There are a few things that could be causing your S10 to not want to start in cold weather. You should check your throttle position sensor, coils or possibly a vacuum leak.