20 Most Recent 2005 Cadillac STS - Page 5 Questions & Answers

A po300 means you have several cylinders misfireing ! Depending on mileage it could just need new plugs ! If you try new plugs only use delco plugs in that vehicle ; it will save you a lot of problems later down the road !

Had a similar problem with my 2008 Volvo S40 and traced the problem to the window switch circuit board. I replaced this and problem was solved.

sounds like a worn switch have it changed and yuo'll be less frustrated trying to get the mirror etc how u want it

sounds like coolant leaking into the cyllanders. when it runs for awhile the coolent "burns off" but when you make the engine work such as speeding up the back pressure forced more into the engine...bad head gasket or a cracked head or block ( water jacket)

probably camhead gasket went, it can give a misfire as well, so spark plug at cylinder 7 should be wet, there also has to be white smoke like steam coming from tail pipe even when engine is hot and water dripping

Sounds like you got blowen Head Gasket!!!

Probably a head gasket problem,once again. It's burning the coolant off the plug . To make sure ,use a "block tester" from NAPA ,it is a liquid that changes color with the presence of exhaust gas in the coolant.

Duplicate question.

You will need to have the Cady dealer scan the systems control module for faults to be sure what is causing this. You can also try replacing the hood open sensor or seeing if it bent and not sensing the hood is fully down/latched.

have the alarm system checked common problem