ec240cl volvo excavater shows engine speed sensor code

[big heard]

i have a ec240cl volvo excavater that shows the engine speed sensor code an replaced with a new one it idled good for a few min but then went back to erratic up an down idling it has good fuel pressure from the last filter before going to injecter pump

 

[DirectTech]

Is the speed sense error code back, if not you can try to shim the sensor a little to see if that helps.