I have oil indicator when turning the engin on and it switces off after a wheel but the oil level found to be ok what is the problem

If it drives OK and doesn't start knocking. Replace the oil sender unit.

how many miles do you have on the car. Is it a low oil level or oil pressure indication and at what engine speed does it come on? Does it do it when the engine is cold or when hot? If the oil level indication is wrong, then you need to replace the level sensor (mounted in the oil pan)

If the oil pressure light is on and the oil level is ok, then this indicates either oil pump or the oil pressure switch is faulty!

Brake Light. Make sure you are not driving with hand brake on. Check brake-fluid level. Top off brake fluid if low and make appointment to check brakes. Driving with brake light can be dangerous; deal with this soon. Call tow truck or drive carefully and slowly to shop.
ABS (antilock brake system) Light. Indicates either low brake-fluid level, stuck brake caliper or faulty ABS. Check brake fluid and make appointment to get brakes checked. Call tow truck or drive carefully and slowly to shop.
Oil Light. Either engine is very low on oil or there is no oil pressure. Pull over and turn off engine immediately. Check oil level and add oil if low. Turn engine back on to see if light has gone off. If oil light is still on, bad oil pump (no oil pressure) is likely. Call tow truck.
Check Engine Light. Car's computer senses engine problem. Difference in performance may not be noticeable, but make appointment to have car diagnosed. This usually cost around $65-$75 to do. OK to drive. If problem is serious, computer may switch to limp-home (low-power) mode and you won't have option of waiting to bring car into shop.
Air Bag Light. Get air bags checked. Problem could prevent them from activating in accident. OK to drive, but not safe in accident.
Battery Charge Light. Alternator is not charging. OK to drive, but turn off any unneeded electrical devices (radio, heater, defroster) and avoid starting engine more than necessary. Bring car into shop soon to avoid getting stranded. When alternator is not charging, battery loses charge and car stops working.
Emissions Lights (O2 sensor, EGR, check emissions). Depending on car model, these lights may indicate problem with emissions sensor or may light up at certain mileage, usually 60,000 miles (100,000 km). Get sensors checked. OK to drive. If problem exists, car might get poor gas mileage.
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I WOULD CHECK OIL PRESSURE FIRST, IF OIL PRESSURE OKAY,OIL PRESSURE SENDING UNIT FAULTY MORE LIKELY.IF OIL IS LOW YOU WILL HEAR RODS KNOCKING NOISE.

Yes its mentioned correct in manual.The HI indication comes on when there is about 1 quart too much oil. Get the excess oil drained.----------- CHECKING ENGINE OIL LEVEL:-------- A sensor in the oil pan allows oil level to be checked
without opening the hood. It provides an accurate measurement of oil level, whereas the low engine oil level indicator warns that oil level is definitely too low. With the vehicle parked on a level surface, the engine is warmed up and shut off for approximately five minutes.When the ignition switch is turned to the ON/RUN position, an ISO oil level icon appears in the trip odometer window and a "clock" icon in the cumulative odometer display. Pressing the knob to the left of the speedometer twice within one second displays one of the following messages:
• OK
• -1.0 Q (-1.0L)
• -1.5 Q (-1.5L)
• -2.0 Q (-2.0L)
• HI
The indicated amount of oil must be added to the engine
if the message -2.0 Q (-2.0L) blinks and a signal sounds.
The HI message indicates that the excess oil must be
removed from the pan to avoid possible engine or
catalytic converter damage. If the ISO oil level icon and
"clock" icon remain on when attempting to check oil
level and no message follows, or if the low engine oil
level warning lamp comes on, a malfunction in the
engine oil level system is indicated. A conveniently
located dipstick allows manual checking of the oil level.
If no leaks are noted, continue to drive to the nearest
service station where the engine oil should be topped to
the "full" mark on the dipstick with an approved oil.--------------------

This is a service required warning light
B" indicates the following services are due:
- Change engine oil and filter, inspect brakes, check parking brake adjustment - Inspect : steering components, suspension components, rubber boots, brake lines, fuel lines, exhaust system, fluid levels and conditions "1" indicates: - Rotate tires

this is a light that indicates low oil pressure or low level, 1st check the oil level in the engine when it is hot, if that is ok you will need to have the oil oil pressure tested with a specail mechanical test gauge, don't wait on this, low engine oil pressure or level can quickly lead to engine failure, have a shop check this ASAP if level is ok and light still comes on.

some cars with oil level warning light on, it doesn't mean that its only reading the engine oil level is low, sometime the transmission fuid too. Did you check your transmission fluid if it is ok or not? try to check and let us know, ok.

First make sure your drain plug and filter are installed and tight, then add 2 liters of oil and check to see if there is any showing on the dipstick. Add one liter at a time and recheck the dipstick. Bring the level up to the full mark on the dipstick. Now start the engine and observe the oil light(turn off) or pressure gauge(pressure goes up) then turn off engine. If neither happens after about 10 seconds, shut off engine and check for leaks or other malfunctions. If all is O.K. then recheck oil level on dipstick. It should be somewhere between the upper and lower level, usually indicated by crosshatch marking. Add oil to bring oil level to full mark. Small amount at a time. Most small vehicles only take about 3.5 to 4 liters.