I got a CEL while taking a long trip yesterday in my 2003 Baja. Nothing seemed out of the ordinary with the way the car was driving, but I decided to drive to nearby Subaru dealer and have them pull the code just in case it was something serious. The CEL went out on my way to the dealership, so I skipped it and just drove the car home w/no incident. This morning, I read the code and it turned out to be a P0519 - IDLE CONTROL SYSTEM MALFUNCTION (FAIL-SAFE). I'd gotten this code about 2 years ago, and when the Baja went into limp mode a couple of times, I had the IACV replaced. No problems since.
I did some googling, and came across a suggestion to check the air filter cover to see if it was seated correctly. When I did, I noticed that the connection between the air-intake duct and resonator chamber was not mated up properly, so I snapped it into place. Could this have caused the CEL by disrupting the flow of air into the intake manifold?
Edited by mrbalihai, 15 November 2013 - 10:13 PM.