Main Engine Problems

• The most common engine-related problems of the 2000 Subaru Forester are failures of the catalytic converter, the air-fuel ratio sensor and the knock sensor. Any of these problems can trigger the "Check Engine" light on the car's dashboard. As of December 2010, it can cost about $1,055 to repair the catalytic converter, about $196 for the air-fuel ratio sensor and around $162 for the knock sensor.
  
  

Cylinder Head Gaskets

• Some 2000 Foresters may also have a failure of the cylinder head gaskets. This particular problem can cause engine overheating and coolant leaks. As of December 2010, it can cost around $595 to replace these components.
  
  

Troubleshooting

• If the "Check Engine" indicator illuminates in your 2000 Forester, there is a high possibility that it is related to one of the aforementioned issues. You may also experience a rough driving feel. In some extreme cases, the mechanics working on the car may have to reprogram the Engine Control Module, which, as of December 2010, costs about $98 for labor.