Coolant Temperture Sensor and Oil Pressure Mix Up?
So I have been working this little problem since I bought my VERY beat up 318i . The CEL is on and the Oil light slowly makes it way to bright while driving and the temperature gauge gets to (but not quite in) the red zone.
When looking around the engine compartment i found a lot of oil had been leaking for a long time from the oil filter housing, so i changed the gaskets and o ring which stopped the leak.
The oil light still comes on slowly, and the temperature gauge still works its way to the red but still not quite.
So I decided to diagnose the CEL. It came out as 1223 which is the Coolant Temperature Sensor. Replaced with a new sensor, and reset the computer. The same code comes up and everything is the same.
So just because I know this car has been worked on before, I decided to switch the connectors of the Coolant Temperature Sensor and the Oil Pressure Sensor around.
Reset everything, started her up, and the CEL no longer comes on. The Oil Light is not coming on but the Engine Temperature Gauge goes to Hot immediately on startup....no light comes on though.
I suspect that maybe because this car has been worked on in the past that maybe the connectors were switched around...or maybe not...how can I be sure I have the correct sensors connected?