Which feul switch is for the sensor for the 2005 Saturn relay

Instrument cluster gauge problem not fuse or relay . GM had bad stepper motor's inside the cluster that drives the gauges . 2003 to 2006 . You have to have it sent out to be fixed , unless you know how to solder electronic componets.
How to repair GM Instrument Cluster Speedometer Gauge Stepper

images for KNOCK SENSOR ON 2005 SATuRN

Where To Find The Knock Sensor 3 0 Litre Saturn Vue ...

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Where To Find The Knock Sensor 3 0 Litre Saturn Vue ... 2006Saturn Ion 2 2 liter P0300,P0128,P0326, and ...

"a sensor" is too vague of a question

there are "many sensors" on a vehicle

Could be airlock in fuel system!

Check your fuel relay.

Could be a bad sensor in one of the doors.
Most models have a sensor in the door latch instead of a switch.

On this website you find information fuse box (diagram and description) for Saturn Relay (2005)

Saturn Relay 2005 fuse box diagram Auto Genius

There could be a few reasons for that happening....It is most likely a FEUL problem. Is it feul injection or carburettor?? If it is a carburretor, then there could be dirt in the jets. You could also have an inline filter that is blocked & not enough feul is getting through to the carb. Another thing that could be causing the car not to start after being running awhile is if the feul line is too close to the engine and is getting too much heat, causing the feul to "bubble" and faporise in the line, untill it cools down. Another cause could be that the float level in the carb is set too low or you have a faulty needle & seat.

Hope this helps.

dont know, but im having the same problem. my pass. side front wont work, and the driver rear wont work. its a 2005 ion 2 i suspect its the motors in both of them. i will let you know in a day or two, as soon as i check the parts yard to get a couple.

Try the crankshaft position sensor. Sometimes they get covered in clutch dust and the sensor cannot determine No1 cyl. and then it will refuse to start. Sometimes they go faulty as well.