Symptoms and causes: Inspection
WARNING: This page is about a different car, the 2022 Subaru WRX. However, it is still accessible from the selected car via links, so may be relevant.
Before performing diagnostics, make sure that the engine oil level is correct and no oil leakage exists.
| Symptoms | Problem parts etc. | Possible cause |
|---|---|---|
| The oil pressure warning light illuminates. | Oil pressure switch | Oil pressure switch failure |
| Oil filter | Clogging of oil filter, malfunction of by-pass valve | |
| Oil strainer | Clogging of oil strainer | |
| Engine oil passages | Clogging of engine oil passage | |
| Oil pump | Wear or damage of the oil pump | |
| Engine oil | Incorrect engine oil or engine oil deterioration | |
| Wiring harness | Short circuit of wiring harness | |
| The oil pressure warning light does not illuminate. | Combination meter | Defective combination meter |
| Oil pressure switch | Oil pressure switch failure | |
| Wiring harness | Open circuit of wiring harness |