Does the 96 RAV 4 have an oil sensor switch? - 1996 Toyota RAV4

there is no oil in a knock sensor , are you sure you are not looking at the oil pressure sender unit , usually fitted at or near the oil filter.

Do you have the dash light dimmer control turned down by chance?

Try using a cheap mechanical oil gauge to make sure you do have oil pressure. If you do, something is preventing the senders from making ground to the engine. Are you using tape or sealer on sender threads? DON"T. the threads are the ground for the sender.

renew the hazard switch it has a internal contact boke and shorting out

possible the oil sender unit is faulty should be an easy fix, matter of replacing sensor.

INSTALL OIL COOLER
-clean the oil cooler contact surface on the oil cooled mounting
-install a new O-ring to the oil cooler.
-temporarily install the oil cooler with the nut
-apply a light coat of engine oi on the threads and under the head of the relief vale
-install the plate washer and union bolt. torque 78Nm (800kgfcm, 58 ft lbs.)
-tighten the nut,torque 8.8Nm (90kgfcm, 78 inch lbs.)
-connect the 2 water bypass hoses to the oil cooler.

HOPE THIS CAN HELP.

Take of the right or left side wheel and you will see a small dipstick for the diff

A/F Sensor Heater Circuit Malfunction (Bank
1 Sensor 1).
You most likely have a bad Air fuel sensor bank 1 sensor 1.

I work for Toyota, and I will be glad to provide you with the actual answer:

The RAV/4 product is available in two models, a 4WD model and a 2WD model.
The difference between the two is on the 2WD model, there is no driveshaft going under the vehicle to the rear wheels, and no rear differential. There is no "RAV/2"; both models are called RAV/4's.

There is a lot of common confusuion about how the 4WD works. It is full time 4WD. In other words, it is always in 4WD. It does not "kick in/kick out/automatically engage", or anything like that. It is 4WD all of the time. But, when I say "4WD", that is sometimes mistaken for "all wheel drive", and, in this case, the RAV/4 is not "AWD". What this means is that if you raise the RAV/4 up on a lift, and put it in gear, 1 rear and the other side front tires will spin. True "all wheel drive" would have ALL 4 wheels spinning. This is not the case with the Rav/4. What the RAV does have, making up for not having "True AWD" on the 5 speed model, however, is a switch that locks the center differential in the transfer case, which, when engaged, applies a method of "locking" the 4WD system for maximum traction, but it is still not AWD. The automatic version doe not have this ability.
The last "true AWD" vehicle for purchase was a 1970's International Scout.
If you are considering purchasing a RAV/4, that is a very good investement. They hold their value quite well, and are virtually bulletproof; I do not make any "money" off my RAV/4 customers...
Just "gas station work". Very nice cars. I hope that this helps you, please feel free to comment back with any otherr questions...Glad to be of assistance.
Toyota Ed

HI.....
The problem on your Vehicle related with the VSV.
VSV . VACCUM SWITCH VALVE..


But the problem is you have 3 VSV On your car.
And all of 3 affect the Emission or smog TEST.

1---- EGR VACCUM SWITCH VALVE
2-- EVAP VACCUM SWITCH VALVE
3---- VAPOR PRESSURE SENSOR VACCUM SWITCH VALVE..

All are located on Left side of Engine compartment.
the EGR VSV on left side of the angine.

Are a Small selenoid with 2 small hoses and one connector of 2 wires.

Ok.. But I recomend get the Vehicle SCANNED for get the right codes.
You can go to some autoparts, Advance, Autozone, Napa, Pepboy's,
They scan your vehicle with no charge , is just a complementary service.
With the Codes you will FIX or REPLACE the right part.

OK... I hope this hlep on your problem.
If you need more information I will able to help.
Thank you for use fixa..