Cause | Elimination Method |
When the ignition is turned on, the oil pressure warning lamp does not light up | |
Faulty oil pressure sensor | With the ignition on, disconnect the electrical connector from the oil pressure sensor and connect it to vehicle ground. If the oil pressure warning light comes on, then the oil pressure sensor is faulty and needs to be replaced. |
An open in the electrical circuit of the oil pressure sensor or oxidized contacts | Check the oil pressure sensor circuit and the condition of the contacts. |
Malfunction of a control lamp of pressure of oil | Replace the oil pressure warning light. |
After starting the engine, the oil pressure warning lamp does not go out | |
Engine oil temperature too high | As the engine speed increases, the oil pressure warning light should go out. |
The oil pressure warning lamp does not go out when the engine speed is increased or lights up while the engine is running | |
Too low oil pressure | Check the engine oil level and top up if necessary. Check oil pressure. |
Short to ground wire from oil pressure sensor | Disconnect the electrical connector from the oil pressure sensor and isolate it. Turn on the ignition. If the oil pressure warning light comes on, check the condition of the oil pressure sensor circuit. |
Faulty oil pressure sensor | Replace oil pressure sensor. |
Low oil pressure at all engine speeds | |
The engine oil level in the engine is below normal | Top up the engine oil level to the correct level. |
The strainer is dirty or there is a hole in the oil receiver tube | Remove the oil pan and clean the strainer or replace the oil receiver pipe. |
Increased clearance in crankshaft bearings. | Check the condition of the crankshaft bearings and replace them if necessary. |
Faulty oil pump | Remove the oil pump, check its condition and replace if necessary. |
Reduced oil pressure at low engine speeds | |
The oil pump bypass valve is in a permanently open position | Remove the bypass valve and check its condition. |
Increased oil pressure at engine speeds over 2,000 rpm | |
Bypass valve does not open | Remove the bypass valve and check its condition. |
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