P CODES (POWERTRAIN) P0500 - P0599 P0503 Questions

Bumping And Hesitating Has Lessened, But When Idling The Jeep Runs At About 2300 To 2800 Rpm. Way Up From The Usual 500-700. I Now Get An...

Hello , I Have Been To A Service Center And While Clearing The Error Log , The Service Guy Went Into The Engin Section As Far As I Know...