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Yes.
yes if its faulty its like going into safe mode your engine will not fire drive safe
more likely to be a faulty coolant sensor or the thermostat is faulty and staying open
Possible causes of gauge not working. Faulty gauge Blown fuse. Open circuit in wiring to the gauge. Temprature transmitter in engine faulty. ( most probably the actual fault ) Lack of coolant in the engine.
Of course your clutch and/or gearbox are faulty...
Faulty sensor get it replaced if not check to make sure wire isn't shorting out
If this is a Power Stroke engine, the most likely cause is a faulty crankshaft position sensor.
Possible causes could be,Timing gear misaligned,Faulty crankshaft position sensor,Faulty camshaft position sensor,Engine oil dirty,Incorrect engine oil viscosity,Crankshaft position sensor circuit is open or shorted,Camshaft position sensor circuit is open or shorted,
Faulty ignition switch.
The crankshaft position sensor can be found on the back of your 1.4-liter engine. You will need to remove the rear engine cover in order to access the crankshaft position sensor.
The whistling will be from a faulty turbo charger
The alternator may have a faulty rectifier or faulty voltage regulator