oil pressure 4 bar without engine running?

[cschmueck]

Hi all,
first run of the year. My oul pressure shows 4 bar with ignition on, engine not yet started. After starting the engine, the oil pressure maxes out with an audible click for the first 3 or 4 minutes.
Has anyone on here had something similar?

[SeanP]

Check your engine ground strap
Pull the wire off of the sender. What does the gauge do? Short the wire to the engine block. What does the gauge do.
If the engine ground strap is ok then replace the sender