If you get a check engine light does this automatically mean something is wrong with the engine,Powertrain,drivetrain? and should be covered under warranty to fix?
Service person is telling me that the parts will cost 300 and with labor 800 to fix after I got a check engine light come on. Am I getting screwed? or should something related to check engine be considered under warranty?

 

This should all be covered under warranty, as long as it is not your fault, ie. accident, hitting something.

Go to another dealer, have them fix it. You should not be paying anything!

 

Did you change anything, like the intake. Did you already take it to a dealer for him to give you that quote. If you did what parts is he talking about?

 

It could be your gas cap was loose, it triggers your CEL.

 

That doesn't sound like a loose gas cap. It also sounds like you're getting the run around. I can't imagine a CEL with consequences like you describe this early in the car's service life unless you modded something and they are working you over because it's modded.

 

check engine light has to do with emissions. emissions components usually have a longer warranty than the rest of the car... and yes, the gas cap could cause the light... but if it's tightened then the light should go off... try another dealer's service advisor.

 

That's a little narrow. CELs can be lit for a lot of reasons that are not emissions related, but are definitely good reasons to check the engine. For example, you will get a CEL if any one of 18 DTCs are activated in relation to your electronic throttle control. It has nothing to do with emissions, but definitely causes the ECM to go into failsafe mode, set DTC(s), and light the MIL and the CEL to let you know there is a serious problem with the engine control.

Sure the gas cap being loose will give an evaporative emissions DTC, MIL, and CEL. But I would hope the gas cap doesn't cost $300 and take $800 labor to install.

 

They gave you a price to repair, but didn't say anything about what was wrong?

Can you please post the whole story?

 

Lexus warranty is 99.9% of the time 4 year/ 50K miles bumper to bumper

Powertrain is 6 year / 70K miles

There is obviously more to this story than originally posted. Vehicle been modified, involved in accident or ????.