One problem related to check engine light on has been reported for the 2007 Subaru Outback. The most recently reported issues are listed below. Please also check out the statistics and reliability analysis of the 2007 Subaru Outback based on all problems reported for the 2007 Outback.
While driving our 2007 Subaru Outback sw on a 6 lane divided highway at 65 mph, the car suddenly decelerated and lost all gas pedal response. My wife was able to move the car to the side of the road although she almost caused an accident due to surrounding traffic. The car started flashing the cruise control, traction control, and check engine dash lights. After allowing the car to sit for a few minutes, my wife was able to start the car again and get home. I checked the error codes and got a p02138. I did some research and found numerous other people experiencing the same issue on the Subaru blogs. All of the other reports pointed to the same source(s) the gas pedal position sensor or throttle position sensor. Most reported Subaru service departments claiming no knowledge of the issue ever happening before. Both my wife and I have had the same thing happen several times since in both local and highway traffic. I have cleaned the terminals on both sensors and this seems to help, but the problem always returns. I read where several other drivers had the gas pedal assembly changed and the issue seemed to be resolved. This seems to be a severe safety issue. Having a car suddenly become dead on the road in the middle of traffic is dangerous to anyone around.