Oil sensor switch on Fiat Siena

**SusanJC** · 05-19-2010

Hi there!
Hope you can help me with my Fiat Siena oil light warning, seems to be an oil pressure sensor problem as well! Can anyone tell me where to find it, or a link to a workshop manual? Its a 2001 1.6

It first started flickering about 6 months ago, only after driving for longer distances or idling through traffic, when you apply petrol pedal, it disappears as well as when you drive, when you stop and idle, it flickers. It has become progressively worse, it went for a service but we changed oil filter when replacing existing oil with a thicker one. That didnt help unfortunately, check oil and other normal stuff very regularly so nothing is lacking.

I want to try replacing the evasive oil pressure sensor before I get into the oil pump or sump plate scews etc.

**scottie2065** · 05-19-2010

is it the low oil pressure warning you are getting?
take a look at these threads to see if it can help you i have no access to a workshop manual at the moment
http://www.clubfiat.net/engine/2598-...-pressure.html
http://www.clubfiat.net/engine/2190-...cornering.html

**PNL** · 05-19-2010

Hello Susan ..its very probably the switch ..causing the flickering light at tick over etc can you tell me what engine size is in the car and I then might be able to give you the location of the sensor /switch..

**scottie2065** · 05-19-2010

Originally Posted by PNL

Hello Susan ..its very probably the switch ..causing the flickering light at tick over etc can you tell me what engine size is in the car and I then might be able to give you the location of the sensor /switch..

its a 2001 1.6 16v phil

**PNL** · 05-19-2010

Originally Posted by scottie2065

its a 2001 1.6 16v phil

Goddam it I really should read the posts more carfully..I thought MEP was speed reader of the year..

Anyway here is a pic for you..hope it helps..switch is No 8..

**johnbrnrd** · 11-19-2010

thanks, must be the oil pressure switch problem for my brother's siena. he has been bugging me to fix it last week. more of a mechanical junkie than a socialite anyway thank you so much for providing the diagram might also check the engine also there's a serious clanking sound... idk but it gives me the creeps listening to it...

**MEP** · 11-19-2010

What miles / km has the car done? Is it high? I remember being told if a car has done really high miles / km that flickering oil light at idle is acceptable??