Volvo All Engines (2010 Emissions) Fault Code: SPN 656 FMI 7 PID: SID 6 Engine Injector Cylinder 6

Conditions for diagnostic trouble code (DTC):
1) Unexpected electrical response

Observable symptoms
1) Power loss

Probable cause
1) Injector 6
2) EGR System
3) Fuel Quality
4) Low compression