2007 FREIGHTLINER M2 CLASS MBE 906

Hello about a month ago I had a check engine light come on in my dashboard, and every time it comes on the truck decreases in speed and acceleration, but when it comes off the truck runs perfect. The check engine light comes on and off intermittently throughout the day when I'm working.

The codes that I pulled were...
Spn0079 occurrence count= 5
1. FMI=2- data erratic, intermittent or incorrect.
2. SPN 79 ROAD SURFACE TEMPERATURE

I'm not sure if this last code was pulled from my truck.
FMI=7- MECHANICAL SYSTEM NOT RESPONDING OR OUT OF ADJUSTMENT.

The only other problems the truck had was the check valve failed, crank sensor failed, and the crank position sensor failed also and the wire harness were replaced suspecting it was some what burned. Last but not least he truck was taken to freightliner were it was serviced.

I don't know what these codes mean if anyone could help me i would be greatly appreciated thanks.

 

The year is a 2007
And the engine is a MBE 906

 

Hi the truck year is a 2007
And the engine is a MBE 906