* Low Oil Level: The most immediate and crucial possibility. A severely low oil level will cause the oil pump to starve the engine of lubrication, leading to rapid wear and seizure. Check your oil level immediately. If it's low, adding oil *might* temporarily alleviate the issue, but you still need to find the source of the oil leak.
* Oil Pump Failure: The oil pump is responsible for circulating oil. If it fails, no oil will reach the engine's components, leading to catastrophic damage very quickly. This is a major repair.
* Clogged Oil Pick-up Tube: This tube draws oil from the sump to the pump. If it's clogged with sludge or debris, the pump won't get enough oil.
* Leaking Oil Pressure Sensor: While a faulty sensor won't directly cause the oil pressure to drop, a leak from the sensor itself could result in low oil pressure. However, this is less likely to cause the complete loss of oil pressure and non-starting condition described.
* Severe Engine Damage: The lack of oil pressure could be a *symptom* of pre-existing engine damage, such as a spun bearing, which could have caused the initial power loss and check engine light.
* Timing Chain/Belt Failure: While less directly related to oil pressure, a broken timing chain or belt can cause catastrophic engine damage, including damage to the oil pump or other components that affect oil circulation.
What to do:
1. Do NOT attempt to start the car. Continuing to crank a car with low oil pressure will cause irreparable damage.
2. Check the oil level. If it's low, add oil *carefully* and check again. Do not overfill.
3. Have the vehicle towed to a qualified mechanic. This is not a problem you can safely diagnose or fix yourself. A mechanic will need to use diagnostic tools to determine the exact cause of the failure and perform the necessary repairs. Ignoring this will likely result in extremely expensive engine replacement.
The combination of power loss, check engine light, and complete oil pressure failure points to a serious mechanical issue. Professional assistance is crucial.
