98 d12c codes

1998 Volvo D12C 10 Speed 877k
MID SID FMI
128 22 11 Engine Timing Sensor / Failure Unknown
128 21 2 Engine Position Sensor / Data Erratic
128 21 11 Engine Position Sensor / Failure Unknown

128 110 0 Engine Coolant / Valid but High
178 100 1 ??? Engine Oil Pressure / Valid but Low
178 100 3 ??? Engine Oil Pressure / Voltage Shorted High
178 100 4 ??? Engine Oil Pressure / Voltage Shorted Low
178 250 2 SAE J1708 Data Erratic / Inactive

What is 178 ??? I can't find it in the manual.

And a bunch of ABS codes that I'm not even going to list.

What does all this mean ? is it the wiring harness or ecu or what ? Please help, the truck has good oil pressure and doesn't overheat...