SOURCE: 2005 saturn ion electrical problem
Probably something shorting out. This is something that probably isn't going to be easy to figure out. You need someone that can diagnose it in person
SOURCE: saturn crankshaft sensor
Right above the started. It can be removed from under the car withour taking the starer out. 5 minute job, one bolt
SOURCE: 03 saturn ion coolant message
I have a 2005 Ion that had been displaying the "coolant" message for quite some time. The car runs perfectly, never overheats and the coolant bottle is always full to the "cold fill level" line when cold and slightly higher than that when hot due to the expansion of the fluid. (all completely normal) I had a strong feeling that the coolant level sensor in the coolant bottle was bad and had read about how it needed to be replaced by a tech and all but I wonderred if there was a way to defeat the sensor since I check my levels all the time anyway because the sensor was really just giving false info anyway. I couldn't find a tread involving a Saturn that talked about a solution other than having a tech charge me lots of money to replace the whole bottle. I found a way to bypass the sensor for a BMW though and thought I would try it. It worked perfectly. I plan on replacing the bottle eventually but right now money is tight and I don't need the sensor to tell me what my own eyes and my car's temperature gauge can tell me for now. Here's how you do it.
1. Unplug the sensor harness from the bottom of the coolant bottle.
2. Find a large paper clip and use needle nose plyers to make a "staple" shaped jumper that is about 1/4 inch wide (about the distance between the two contacts on the harness) and about 3/8 inch long.
3. push the jumper you just made into the end of the harness connector.
4. Start your car and ensure that the warning is no longer displaying. You can also insert the jumper while the car is running (be careful, the coolant bottle will be hot) because the harness is removed from the sensor the coolant warning should already be displayed. When you insert the jumper the message should go away imediately. The coolant level sensor has only one job and that is to tell the computer when coolant is low so you don't have to worry that you may be causing any other problems by doing this. If the coolant light doesn't go away you may have a break in the wire somwhere or a bad connection to the jumper.
5. If all works well, use electrical tape to seal up the end of the harness so moisture doesn't get in. Also it's a good idea to secure the harness to something nearby so that it doesn't flop around when you are driving.
All done. Sorry this was long but I hope that it helps someone. That warning really has been irritating me.
Keep in mind that this method does disable a key safety device that is designed (poorly) to warn you in the even of a coolant leak. Keep an eye on your temperature gauge and check your coolant level regularly. Get the bottle replaced when you can.
SOURCE: have 2004 saturn ion. coolant light stays on all
LOW LEVEL COOLANT SENSOR BAD OR EITHER WIRE CONNECTOR TO SENSOR IS LOOSE OR HAS A SHORT IN IT.
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