Toyota is recalling certain 2005-2008 Corolla and Matrix models because a crack may develop on a circuit board inside the engine control module (ECM). Consequences associated with this defect include: illumination of the Check Engine Light and harsh transmission shifting. The engine may not start or it could stall while driving, which can increase the risk of a crash. Dealers will inspect the ECM and replace as necessary.
 
Recalls
Recalls are issued for cars with safety-related defects or problems
2005 Toyota Matrix
Toyota Recalls 2005-2008 Corolla and Matrix Models Due to Cracked ECM Ciruit Boards
Exhaust & Emissions, December 21, 2010