
Insufficient engine oil level causes the lubrication system to lack oil or have insufficient oil, resulting in low oil pressure. It is recommended to replenish the oil promptly. When the oil becomes thin due to high engine temperature, it may leak through the gaps between engine friction pairs, leading to low oil pressure. Consider replacing the oil. Damage to the oil pump or excessive wear of its components can reduce or completely halt oil intake and pumping, causing the warning light to remain on. Recommended to have it inspected and repaired. When the oil viscosity drops below a certain level, the oil pressure will fall below the engine's specified pressure, triggering the oil warning light.

My UY125 also had the issue of the oil light not turning off before, and I figured it out later at the repair shop. Actually, after changing the new oil, the light should go off by itself, but sometimes you need to reset it manually. The specific operation is: first turn the key to the ON position without starting the engine, then quickly press the button on the right side of the dashboard twice, and hold it down until the oil light flashes and turns off automatically. You might need to try this two or three times to get it right. I must remind you to always check the oil level on the dipstick before doing anything—if the oil was just changed, it should be fine. If the light stays on after several attempts, it might be a sensor malfunction. Don’t force it; get a professional to check it immediately, or you could risk serious engine damage.

As a seasoned motorcyclist with over a decade of experience, I believe there are three common reasons why the oil light won't turn off: First, the oil sensor might be dirty—removing it and spraying with carburetor cleaner often does the trick. Second, after , the mechanic might have forgotten to reset the system, requiring a specific button combination to reset it. Third, there could be poor electrical contact, so check if the sensor plug is loose. If you really can't fix it, don't push your luck—I've seen people messing around and burning out the wiring, only to end up towing the bike to the shop. A handy tip: Remember the steps—hold the dashboard button after disconnecting the power, then turn on the power and release the button when the light flashes. This method works for most Japanese motorcycles.

Last time my cousin's UY125 oil light stayed on, which was actually just a reminder. The reset method is super simple: turn off the ignition, hold down both the instrument button and turn signal switch simultaneously, then turn the key until the indicator light goes off. The whole process takes less than half a minute. Make sure you've just done maintenance, otherwise it might indicate low oil level or a clogged filter. If none of these are the issue and the light remains on, it could be an instrument cluster malfunction requiring a diagnostic tool reset at the dealership. Remember, timely oil changes are far more important than just resetting the light.

New riders encountering this issue shouldn't panic, first check the basics. Open the seat and inspect the oil dipstick - the oil level should be between the upper and lower marks. If normal, try resetting: with the key off, press and hold the left button on the instrument panel, then turn on the ignition while continuing to press for 20 seconds to see if the light goes off. This model's oil light is actually more of a reminder, alerting you to change oil at 3,000 km. If the light comes back on soon after resetting, it might be due to damp circuitry - park the bike in a dry place and try again the next day. Avoiding the dashboard connectors when washing the bike can prevent this situation.

In our mechanic circle, we typically handle such issues in three steps: first scan for trouble codes with a diagnostic tool, then test the oil pressure value, and finally perform a manual system reset. However, for DIY solutions, we recommend this method: press the instrument cluster button five times with the engine off, then after starting wait for the tachometer needle to complete one full rotation - the warning light should extinguish. Remember this must be done when the engine is cold, as electronic components become unstable at operating temperature. After resetting, monitor oil pressure closely - if you notice the engine sound becoming heavier during low-speed driving, be alert as this indicates the light reset merely masked an underlying fault. Using premium quality engine oil with regular changes can significantly reduce false alarm occurrences.


