Skip the auto shop - Our mechanics make house calls

Q: Red oil light just came on - 2010 Ford Flex

asked by on

Driving to a rural area on vacation when oil light came on and stayed on. Oil was changed 1000 mile ago. Oil level is good. Check engine light has not come on. The one mechanic in town said replace sensor. I asked him to hook car to obd reader. He did and while engine was off, the computer said there were no errors at all. He didn't start the engine with the obd reader attached but I don't know if that is necessary. New sensor could aririve today but I don't know if I need to put vacation on hold and wait for it or if I can continue to drive car.

My car has 91000 miles.

A: A quick "diagnosis" can be obtain...

A quick "diagnosis" can be obtained by unscrewing the pressure sensor and installing an external oil pressure test gauge. YourMechanic will compare the oil pressure at idle to the factory spec., but normally at idle you should see approximately 10 PSI of pressure, rising to perhaps 40-65 PSI at highway speed.

If the pressure is "normal", obviously you can use the car for the time being as the activation of the warning light would obviously be due to a malfunction in the circuit (including the "sensor"). If the pressure does turn out to be too low, the reason has to be determined, and repairs made, because driving the car with low oil pressure will ruin the engine.

If you are lucky, it might be something simple like a defective oil filter but if not, the entire lubrication system will have to be diagnosed. To avoid any unnecessary repairs, have one of our mobile technicians come to your home to further diagnose the warning light and help you make the necessary repairs.

Was this answer helpful?

Need advice from certified mechanic? Get help now!

Over 1000 mechanics are ready to answer your question.
The statements expressed above are only for informational purposes and should be independently verified. Please see our terms of service for more details

Get an instant quote for your car

Our certified mechanics come to you ・Backed by 12-month, 12,000-mile guarantee・Fair and transparent pricing

Get a quote

What others are asking

Q: Car won't start - 2005 Ford Explorer

The first question to answer for yourself is, does the engine attempt to start, also known as cranking over? If not, then you need to be concerned with your starting system. The battery may be powerful enough to power accessories,...

Q: Temporary engine noise

Hello. It sounds like your serpentine belt or one of the pulleys for the serpentine belt is the cause of the bad noise you are hearing. It is also possible that there is a bad pulley for the timing belt....

Q: Traction Light coming on

Hello. Your car is equipped with wheel speed sensors at each of the four wheels which monitor wheel speed while relaying this information constantly to the ABS and traction control system which are controlled by the car's ECU. When the...

Related articles

How Do Power Car Windows Increase Passenger Safety?
Power windows are responsible for approximately 2,000 emergency room visits every year. When a power window closes, it exerts enough force to bruise or break bones, crush fingers, or restrict an airway. Though...
P0240 OBD-II Trouble Code: Turbocharger Boost Sensor B Circuit Range/Performance
P0240 code definition Turbocharger Boost Sensor B Circuit Range/Performance What the P0240 code means P0240 is an OBD-II generic code triggered when the Engine Control Module (ECM) detects the intake boost...
P2428 OBD-II Trouble Code: Exhaust Gas Temperature Too High Bank 1
P2428 code definition A P2428 trouble code signifies that the PCM has detected a problem in the exhaust gas temperature sensor circuit in bank 1, which subsequently contains the number one...