The oil pressure warning light is one of the dashboard warnings that should never be ignored. It is usually shown as a red oil can symbol and can indicate that the engine is not maintaining adequate oil pressure.
Low oil pressure can cause serious engine damage if the vehicle continues running, so knowing what to do when the warning appears can save you from a much bigger repair.
What does the oil pressure warning light mean?
The warning light generally indicates that the engine oil pressure has fallen below the level required for proper lubrication.
Engine oil needs to circulate through the engine to lubricate moving components and help reduce friction and heat. If the oil pressure becomes too low, important engine parts may not receive adequate lubrication.
A brief oil pressure light during engine startup can be normal on some vehicles. It should normally go out once the engine builds oil pressure.
If it stays on while the engine is running, the situation needs attention.
What should you do when the oil pressure light comes on?
Do not simply continue driving and hope that the light disappears.
Safely pull over as soon as possible, switch off the engine and allow the vehicle to sit before checking the oil level according to the manufacturer’s instructions. Continuing to run an engine with genuinely low oil pressure can cause severe mechanical damage.
If the oil level is low and your vehicle uses the correct specified engine oil, it may need to be topped up. However, if the warning remains on after the oil level is corrected, the engine should not be driven unnecessarily.
What causes low oil pressure?
Low oil pressure can have several causes.
Possible problems include:
- Low engine oil level
- Oil leakage
- Incorrect or degraded engine oil
- A blocked oil filter
- A failing oil pump
- Excessive internal engine wear
- A faulty oil pressure sensor
- Problems within the engine’s lubrication system
The correct solution depends on what is actually causing the pressure problem.
Can low engine oil cause the warning light?
Yes.
If the engine oil level becomes too low, the oil pump may not be able to maintain the required pressure.
Oil can become low because of a leak, oil consumption or simply because the vehicle has not been maintained correctly.
This is why checking the oil level regularly is important, particularly before long journeys.
What if the oil level is normal?
A normal oil level does not automatically mean the engine is fine.
The warning can still be caused by a faulty oil pressure sensor, oil pump problem, blocked filter, unsuitable oil or an internal engine issue.
If the oil level is correct but the warning remains illuminated, have the vehicle inspected rather than assuming the sensor is faulty.
A technician may need to test the actual oil pressure with appropriate equipment to determine whether the engine genuinely has low pressure.
Can you drive with the oil pressure warning light on?
It is generally not advisable to continue driving when a genuine oil pressure warning remains illuminated.
Unlike some maintenance reminders, an oil pressure warning can indicate an immediate lubrication problem. Continuing to run the engine could turn a repairable issue into major engine damage.
If the light appears while you are on the road, find a safe place to stop and switch off the engine. If necessary, arrange professional assistance or vehicle recovery.
Oil pressure light vs oil change reminder
These warnings are not the same.
An oil change reminder tells you that routine engine oil maintenance is due. An oil pressure warning indicates a potential problem with the engine’s oil pressure system.
Changing the oil may be part of solving an oil pressure problem, but the warning should not automatically be treated as a normal oil-change reminder.
What if the light only comes on when the car is idling?
A warning that appears mainly at idle can still require investigation.
Oil pressure can change with engine speed, and an engine with a developing lubrication problem may show symptoms differently at idle compared with higher engine speeds.
Possible causes include low oil level, an oil pressure sensor problem, a worn oil pump or internal engine wear.
Do not assume that the problem is harmless simply because the warning disappears when you accelerate.
How can you prevent oil pressure problems?
Regular maintenance can reduce the likelihood of lubrication problems.
Keep up with:
- Engine oil changes
- Oil filter replacement
- Regular oil-level checks
- Inspection for oil leaks
- The manufacturer’s recommended oil specification
- Routine vehicle servicing
If you notice oil underneath the vehicle or repeatedly need to add oil between services, investigate the cause instead of continually topping it up without inspection.
Check the oil before a long journey
Before an interstate trip or other long journey, check your engine oil level when the vehicle is parked safely and follow the manufacturer’s recommended procedure.
It is also worth checking for visible leaks and paying attention to unusual engine noises.
If the oil pressure warning has appeared recently, resolve the issue before setting off on a long trip.
For Nigerian drivers dealing with heavy traffic, high temperatures and frequent long-distance travel, proper engine maintenance is particularly important.
Travo.ng can also assist with relevant travel, transport and mobility arrangements when a vehicle problem disrupts your plans.
Don’t ignore the oil pressure warning light
The oil pressure warning light is there to alert you to a potentially serious engine problem.
If it comes on while the engine is running, stop safely, switch off the engine and check the oil level. If the warning remains or returns, get the vehicle professionally inspected rather than continuing to drive.
Acting early can help protect the engine and prevent a potentially expensive breakdown.
