What problems can low oil pressure cause in a car?

[DelElena]

If the vehicle continues to be driven with excessively low oil pressure, minor consequences include accelerated abnormal wear of internal engine components, unusual noises, and component damage. Severe cases may lead to internal bearing seizure, piston burning, and mechanical parts becoming unusable, requiring a major overhaul or complete engine replacement. Below are the reasons for low oil pressure: 1. Check if the oil level is normal; severe oil loss can cause low oil pressure. 2. Verify the oil pressure switch, engine wiring harness, and instrument cluster are functioning properly. 3. The oil pump screen may be clogged or the internal pressure relief valve may be faulty. 4. The oil filter may be blocked or due to the use of substandard or incompatible replacement parts. 5. Cylinder head gasket damage, or clogging/cracking in the engine cylinder head or block. 6. Excessive clearance or pressure leakage in major engine components such as the crankshaft, camshaft, or connecting rod main bearings.