Some 2015-2016 Scion Fr-S may exhibit a condition where the engine idle speed fluctuates (typically 500-1000 rpm) only when the transmission is in Park or Neutral shift position. This condition occurs after the vehicle has been driven about 25 miles or more at highway speeds. The transmission control module (TCM) logic has been revised to address this condition. See SSB 0021-15 * Reprogram the Transmission Control Module
