Release the Cancel button once the LED lights come on. This resets both the printer and the NVRAM together. Press and hold the Reset button near the back of a 5P or 6P printer as you turn on the power. Holding it for less than 20 seconds resets the printer only.
Once the throttle body is exposed, spray the throttle-body cleaner inside the air duct, and use the brushes to gently dislodge the dirt, gum and varnish that are present. Note: Be very careful not to let the thin, plastic spray nozzle (or anything else!) fall into the throttle-body opening.
1 Scan the computer system for codes. 2  Test the throttle position sensor and related wiring. 3  Remove and replace the throttle position sensor if found faulty. 4  Clean the carbon from throttle body.5  Re-install throttle body and reset minimum idle speed to factory specs. 6  Clear trouble codes and check for proper operation. Scan the computer system for codes. 2  Test the throttle position sensor and related wiring. 3  Remove and replace the throttle position sensor if found faulty. 4  Clean the carbon from throttle body.