can engine oil overfill cause check engine light?

I'm not sure if it will trip any lights but yes over filling will decrease fuel economy. Also not sure if 4 cycle motors are like 2 cycle in regards to over filling but if you over fill 2 cycle motors you run the risk of blowing motor.

 

Run the check 12V battery procedure. You had the car parked for a week...

 

A 2 cycle engine does not have oil in the block! Oil is mixed into the fuel. Hal

 

I think we can all agree that if you poured a lot of oil into a 2-smoke engines block that it would cause problems.:evil:

Except for some, such as Detroit Diesel 2-stroke diesels

 

When I first started to change my oil, I worried about getting it dead-on the top mark.

Turns out, it is not as important as it may seem. That doesn't mean you can ignore the marks, though. Half-inch....If I recall, that is probably about 16 oz. too much oil. Too much, sure. Probably not ultra-critical that you fix it right away, but it's not my car.

If it were just a couple of ounces, I would ignore it, but in your case, you should probably try to fix it.

Easy way -- so I have read, never done it myself -- get a turkey baster. Some skinny plastic tubing. Snake the tubing down the dipstick tube until you "strike oil." Tape tubing to turkey baster with duct tape, start squeezing.

Or, just drain your oil.

Or, use a Fumoto valve in place of your oil drain plug. Makes fixing these errors easy. If you are going to change your own oil, I would recommend the final, Fumoto solution....search google for fumoto valve.

 

Matters not, these damn puny things go quickly with no notice.

http://priuschat.com/forums/newbie-forum/73400-weird-stuff-happening-mpgs-dropping-test-battery.html

 

Next time use 3 quarts. It's plenty. Of course if the engine is burning oil you'll have to check it sooner.

 

Yes, overfilling the engine oil can cause the CEL to come on. This is especially troublesome in subfreezing weather, when "fail to start" related errors may result in a tow to the nearest Toyota dealer.

 

You might try lowering the level of oil a bit and then disconnect the MAF electrical connector below the air throat. While you are at it, check/ replace the filter, spray the throat and MAF sensor with the proper cleaner, physically wipe down the throat and butterfly valve with a clean napkin , spray connector with electronic spray cleaner AND reassemble. This should cure the Engine Malfunction Light. If you have never cleaned this area, it is way overdue. :cheer2: