I got an ERR on my sensor check RPM how do I clear it and what do I check.

 

go to screen i believe 33, there press the "ref" button to the right until you see that it blinks and it says something like... err,ok,ok,ok...or something like that when it blinks again it sais something like...map,rpm,tps,dc.That first spot where the err is would be map,that way you know theres something wrong with the map sensor. hope i didnt confuse you.

 

Thanks for the reply It showed ok this morning but it was an error code on the RPM last night.
What does this mean ? The ecu isn't getting a correct rpm signal ?