AMI 335 code help

[moonpuppy]

New to working on Macks here. Have a AMI 335 in a 05 cv513 concrete mixer. Flash code shows 2-7 which seems to be oil pressure. Using a plug in it shows code 175 id 5 turbo oil temp fault. Check have great oil pressure, changed pressure sensor and oil. same issue. I have 4.8 - 5.0 volts at sensor. I have no wiring diagrams or anything for this truck. Any help is much appreciated.

[Mackpro]

2-7 code on a Aset engine is the oil temp sensor. It a 2 prong sensor next to the oil pressure sensor which is behind the rear most oil filter . This sensor is usually damaged when replacing the starter. 

[moonpuppy]

Thanks MACKPRO. Heres the thing. I have 4 of these in the fleet and none have this sensor, (that I can find) the only sensor on the base is the pressure sensor. I dont have a wiring diagram to trace the wiring on these units to do any testing. So I purchased the sensor found the plug in ang just zip tied the sensor up. Code cleared truck running great. Not sure what all has been done to these over the years as I just started and the trucks were recently purchased.