Coolant Level Sensor 2008 Camelot 42 PDQ
I just replaced my coolant surge tank with a metal one. While taking the coolant level sensor out of the old plastic tank, the sensor broke off leaving just the two metal prongs sticking out. I bought a new sensor, part #ATP PBT-GP30 from Advance Truck Parts. Installed it thinking all would be fine but the ECM threw a code and my dash warning light came on. Tried uninstalling and reinstalling, checked the fluid level, checked the plug etc but no luck. Still showing a code. I purchased a second sensor from Advance Truck Parts, part #ATP 2872769, and installed it. Same result. The ECM threw a code indicating a problem with the coolant level. I then put the prongs from the old sensor in bottle full of water and plugged it in. No code and the RV thinks all is fine. All three sensors look identical except the original one has white plastic where the plug goes in. The other two have black plastic where the plug goes in.
Can anyone tell me what the correct sensor is? The old sensor is a Casco 700679002 I believe but those have supposedly been updated to the 2872769. Cummins says it a chassis issue so they were no help. Any suggestions on right part number and source? The Camelot has a 400 ISL Cummins.