Both.
It means look at your gauges. Something is wrong! Does your temperature gauge show that it is overheating? Is the oil presure where it should be? Check your fluids.
You will need to run an oil pressure test with a pressure gauge.
They don't have fuses. The speedometer is controlled by the speed sensor(s) and the temperature gauge is controlled by the coolant temperature sensor.
low coolant
try replacing the thermostat
Most likely you have a faulty temperature sending unit, which is located on the front top of the engine block. Before you do this procedure, make sure there are no lose or broken wires from the sending unit, to the temperature gauge on the front dash board.
i have sort of the same problem on my dodge 2000 the temperature gauge recently went out and i replaced the sensor but the gauge always reads 0 your not alone with this one...
Center of gauge. 180-220 FCenter of gauge. 180-220 F
Just to the side of the thermostat housing.
It is located to the left of the thermostat housing for the temperature gauge, there is another to the right of the thermostat housing for the computer.
The relay sensor is likely defective
As long as it is in the normal range (not at either extreme) you should be OK