P2106 can be caused by many, many faults other than a failed water pump including: general engine overheating, coolant leaks, EGR valve malfunctions, mass air flow sensor malfunctions,
drive axle modifications, ABS, Traction Control or Stability Control failures, automatic transmission...
Hardware
modifications to ensure that maximum possible power delivery can be achieved include reinforced front and rear
axle differentials, high - strength output and
drive shafts and a high - torque transmission gear unit.