1. Engine Oil Deprivation: The primary role of the oil sending unit is to monitor oil pressure and send this information to the car's gauges and warning systems. When the sending unit malfunctions and provides inaccurate readings or fails to deliver any readings, it can lead to engine oil deprivation. If the oil pressure is low or nonexistent, essential engine components won't receive the necessary lubrication, leading to increased friction, overheating, and premature wear. Piston rings, connecting rod bearings, crankshaft bearings, and camshaft bearings are among the parts most vulnerable to damage. Without sufficient oil, these parts can seize or fail, causing severe engine damage and potentially requiring expensive repairs or even engine replacement.
2. Oil Pressure Gauge Inaccuracy: A faulty oil sending unit may provide incorrect oil pressure readings on the dashboard gauge, misleading the driver about the actual oil pressure in the engine. This can prevent the driver from detecting potentially dangerous oil pressure issues until significant damage has occurred. As a result, drivers might continue operating the vehicle with low or no oil pressure, further exacerbating engine wear and potential damage.
3. Engine Overheating: Insufficient oil can lead to inadequate cooling of engine components, especially in high-performance or heavy-duty vehicles. Without proper lubrication, friction increases, generating excessive heat. Overheating can cause warped or cracked engine components, head gasket failure, and other severe issues. Over time, persistent overheating can drastically shorten the engine's lifespan.
4. Warning System Malfunction: A faulty oil sending unit can compromise the vehicle's warning systems. If the sending unit fails, the dashboard warning light may not illuminate even when oil pressure is dangerously low. As a result, the driver won't be alerted to the problem, potentially leading to more significant engine damage and a greater repair cost.
For all these reasons, a bad oil sending unit should be promptly diagnosed and replaced to ensure proper engine lubrication, accurate oil pressure readings, reliable warning systems, and ultimately, the longevity of the vehicle's engine.
