VNC07

Hi. When the driver door is opened, sometimes will hear a fast clicking under the hood and the Service Endine message comes on when key is turned to run. It will sometimes clear if the key is cycled on/off, but if not will run rough in limp mode. Throws a throttle position voltage correlation warning or ICM torque calculation performance. Both the throttle boby and the gas pedal relaced and still happens. Any ideas?