Question about 2000 Saturn SL

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Engine diagram for saturn sl2 1998

Where can I find a diagram of the engine so my husband can replace the cool. sensor and possible another sensor on my car so it will not start with a rough idle?

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Try pulling the engine coolant temp sensor, They often crack not sure why but the ceramic tip cracks makes the car hard to start, the car's idle may race while shifting gears, and often smokes. The sensor is on the right side of the engine when looking at it on the head. Easy to change and get too

Posted on Jan 17, 2009

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Car fan running constantly with car on and check engine light on.


Possibly a bad coolant temperature sensor, sending the wrong signal that engine is hot and requires fans to be on for extra cooling. I don't know of any sensors for the thermostat, but don't know saturns.

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1 Answer

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you may want to possibly look into replacing the coolant temp sensor.the sensor is located on the drivers side of the engine just below the air filter tube going to the throttle body-going into the engine block. remove the sensor and check to see if it corroded or even cracked. if so replace the sensor and connector. bot are easily available. you also may look into replacing the thermostat,if the thermostat is stuck then coolant(antifreeze) is not flowing into the engine,so therefor it is not sensing the it is getting hot enough to cool down,so the fans wont turn on.
these would be the most common problems. it is not impossible that you have something wrong with the cooling fans themselves but it is not that common.

Dec 14, 2011 | Saturn SL Cars & Trucks

1 Answer

I have a 2003 Saturn Vue 2.2L. The cooling fan is not comomt on when the engine is hot.


Have the coolant temperature sensor checked or replace.
That sensor is tied in with the cooling fans. When the coolant temp increases it turns on the fan.
It is usually located around the thermostat housing or screwed into the engine block with a 2 or 3 wire connector on it.

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1 Answer

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Hi, no, they are not related. The oxygen sensor(s) are part of the ignition/emissions sytem and help regulate fuel flow/mixture. The A/C system is self contained and does not affect other engine systems. Mike

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My husband just finished helping a friend replace his fuel pump for their 2004 Saturn Vue because the symptoms prior to the replacement lead to a bad fuel pump. Here's the problem, now that it is replaced...


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1 Answer

Coolant system


The car overheats because the fan system is not working. The engine coolant sensor tells the computer to turn on the fan when it gets hot and also sends temperature readings through the computer to the heat gauge. Try turning the AC on if you have it--it should immediately start the cooling fan. If nothing, check the fan fuse and relay. It's also possible that the fan motor is frozen due to bad bearings. Try replacing the coolant temperature sensor to see if that restores the gauge readings. Hope some of this helps!

Jul 02, 2010 | 2000 Saturn SL

1 Answer

I need wiring diagram for 2001 Saturn L300, I also fuel sys dgrm


Mine was doing same, but also revving up weird. I replaced the Crankshaft position sensor and it didnt work. Today I changed the Engine coolant temp sensor and it fixed my problem. Hope this helps!!

Dec 20, 2009 | 2001 Saturn L-Series

1 Answer

Is it possible to replace an engine from a 99 saturn sl with a newer model motor? if so which years can i use?


I doubt this is possible, the engine may bolt into place, but sensor and wiring may be different.
check with your local Saturn parts department or call a wrecking yard. Smog laws will not allow different year engine in different year car.

Nov 03, 2009 | 1999 Saturn SL

2 Answers

Engine shuts off when it gets warm


Try crank position sensor, it's common for those to stop working when they heat up

Jun 09, 2008 | 1999 Saturn SL

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