first i would start by checking the fluid level make sure its were it should be. if that's fine than it's most likely your thermoste. Replace that and you should be good as new.
Low Coolant? Weak Temerature sensor? Weak gauge Gauge working properly and recording the thermostat opening and closing as engine temperature fluctuates
Either your oil pressure gauge is reading low , your engine temperature gauge is reading high , or your fuel gauge is reading low so your almost out of gas
No , the CHECK " GAGE " light comes on if the gas gauge is at or near empty , the engine coolant temperature is HIGH , or the engine oil pressure is LOW
Yes, it can.
It means that the hydraulics which operate your fuel and temperature gauges may be leaking or damaged. One or more of the gauges is out of the normal operating range when engine is running. It could be the oil pressure gauge is reading to low, the temperature gauge is reading to high or the voltmeter is reading to low so, check the gauges.
Start buy checking you coolant level. If it is low the you may have a leak, and this may be causing your heat not to work properly. Secondly, watch your engine temperature gauge to make sure that your engine is reaching normally operating temperature. If your engine is running too cold then you need to check your thermostat and heater core.
The engine coolent may be low enough that sensor is not surounded with coolent when engine is not running.
For a 2001 Ford Explorer : No , there is an engine temperature gauge Also , there is a " CHECK GAGE " light ( the light will come on if the engine coolant temperature is too high , the engine oil pressure is too low , or the fuel gauge indicates it is at or near empty )
Have you noticed your engine temperature gauge running cooler than normal ? A thermostat that is sticking open will make the engine run cooler and cause the P0125 trouble code , also - coolant level low - faulty engine coolant temperature sensor
Using a gauge and the proper type of freon, connect to the low side ac gauge. With the ac on high and the engine running fill the system to the full mark on the gauge.
Connect a freon gauge and the freon can to the low side ac port. With the ac running on high and the engine running, open the freon. Let it flow until the gauge shows that the system is full.
If your engine coolant temperature gauge is indicating that it is running much cooler than normal ( it sounds like the engine cooling thermostat is sticking open / not closing completely ) which means you need to have the thermostat changed. You should consider if have good heat from your heater and if your check engine light comes on.