Sensor Problem

Recently it seems that several of the sensors to various gauges are going crazy. First the low coolant indicator started blinking on and off in very cold weather when the car is cold yet the coolant is full.
Now the temperature gauge sticks in the middle or 1/4 of the way most of the time. And sometimes the gas hand sticks also.
Also, the intermittent wipers are now making an electrical clicking sound when in intermittent mode.
All of this started right after my oil filter burst going down the road one day and oil covered the engine. I had the car towed in and they degreased the engine.
Any suggestions??
Thanks,
John

Check connections under the hood for the sensors you are having problems with. Either oil could have gotten inside them causing a poor connection or if they power washed the engine the connectors may have come partially disconnected.