There are a few possible reasons why the oil light might come on when the engine is idling in a Vauxhall Frontera.
- Low oil pressure: This is the most common cause of the oil light coming on. If the oil pressure is too low, the engine will not be able to get enough oil to the moving parts, which can cause damage. The oil pressure sensor is located on the engine block and sends a signal to the instrument cluster when the oil pressure drops below a certain level.
- Low oil level: If the oil level is low, the oil pump will not be able to draw up enough oil to circulate through the engine. This can cause the oil pressure to drop and the oil light to come on. The oil level can be checked with a dipstick.
- Oil pump failure: If the oil pump fails, it will not be able to circulate oil through the engine. This will cause the oil pressure to drop and the oil light to come on. The oil pump is located on the front of the engine and is driven by the crankshaft.
- Oil pressure switch failure: If the oil pressure switch fails, it will not be able to send a signal to the instrument cluster when the oil pressure drops. This can cause the oil light to come on even when the oil pressure is normal. The oil pressure switch is located on the engine block.
If the oil light comes on, it is important to stop driving immediately and check the oil level. If the oil level is low, add oil and start the engine. If the oil light stays on, turn off the engine and have it towed to a mechanic.
