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.
Best Answer: the throttle body (TB) controls how much air gets to the engine. It might be safe to drive it but you will probably experience a decrease in gas mileage and lowered performance. There is not fule connected right to the tb so there is no chance of it catching on fire. The fuel injectors are quite a ways from the tb.