Where is oil pressure sender - Cars & Trucks

Remove the oil light sender unit, fit a oil pressure gauge start engine if oil pressure present replace sender unit, if no pressure oil pump is at fault or pressure valve stuck open

If you go to a parts store, I prefer CARQUEST, they will gladly print up a schematic or just show you where it is if that is all you need.

o.k. but the sender has a bimetal element inside it even if the connection looks good the sender inside can be damaged and not making contact thus no reading also I think you might have the wrong sender installed so here's the photo's to help you

2.3L with the gauge

2.3L with the light

2.9 with the gauge

2.9L and the 2.3L are the same for each engine with the light the gauge senders are different this could be the problem wrong sender installed and its not reading pressure because it can't? good luck stephen

Oil sender unit possibly. Have seen problems with some of the Toyotas sender units before. Best to take the sender unit off and check the oil pressure to be safe so you do not cook the engine.

It's a warning light system that no oil pressure exists. If it doesn't work, it won't cause damage, you just won't know if and when your oil pressure is lost. The sensor or sender unit is very inexpensive on most vehicles, like under $10.
All the sender does is cause the oil light to go off when it detects minimal pressure. A valve inside the sender moves and causes the sender to stop grounding the warning light, and so the light goes off.

Replace your oil pressure sender (it screws into the head and has a single wire going to it)and the problem should go away. If you replace the oil pressure sender and the light continues to stay on, try another oil pressure sender. If the light is still coming on, replace the oil pump in the oil pan.

Not sure of your engine size so please pick the appropriate diagram:

Coolant temperature and oil pressure senders-4.3L engines

Coolant temperature and oil pressure senders-5.0L and 5.7L engines

Coolant temperature and oil pressure senders-7.4L engines

Coolant temperature and oil pressure senders-6.2L and 6.5L diesel engines

You need to verify that oil pressure is ok.
They sell gauge at the parts store which has to be connected to the engine block via oil pressure sender hole.
For that , take out oil pressure sender(unscrew) and screw the gauge in to the hole (con thread).Run the engine and see if pressure is ok at idle and on higher RPM.Gauge suppose to have scale (norm. , low , high ).If oil pressure within specs , repl. oil pressure sender.
Or just replace oil pressure sender and see if that helps.They are not expensive ~ $30.00 , gauge probably the same money.

Removal & Installation

1. Disconnect the negative cable from the battery.
   
2. Raise vehicle on hoist.
   
3. Remove front splash shield.
   
4. Disconnect oil pressure sender connector (4).
   
5. Remove the pressure sender (2).
   

Oil pressure sending unit


To install:

1. Install oil pressure sender.
   
2. Connect oil pressure sender wire.
   
3. Install front splash shield.
   
4. Lower vehicle.
   
5. Connect the negative battery cable.
   

Removal & Installation

1. Disconnect the negative cable from the battery.
2. Raise vehicle on hoist.
3. Remove front splash shield.
4. Disconnect oil pressure sender connector (4).
5. Remove the pressure sender (2).
   

To install:

1. Install oil pressure sender.
2. Connect oil pressure sender wire.
3. Install front splash shield.
4. Lower vehicle.
5. Connect the negative battery cable.