1990 Chevrolet 2500 Pickup Q&A
1990 Chevrolet 2500 Pickup Question: What could cause high oil pressure reading?
As a tech I would remove the sensor switch. Install a good guage and see what the actual pressure is. If the pressure is not the same as say 80psi I would put a new sensor in and see what it shows on your dash guage. If it still was showing high pressure then the dash cluster would have to be exchanged or repaired. Most oil pressure sensors are side of engine block near oil filter. - milesauto