Question about 2006 Saturn ION

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Temperature sensing replaced temp sensor, rewired the connector (not replaced but doesn't look corroded. Temp gauge still stuck at minimum.

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  • Saturn Master
  • 21,873 Answers

There should be two sensors - one for the computer and one for the gauge. Are you working on the right one ? Can you ground the sensor plug and make the gauge move ?
Is the engine warming up ?

Posted on Jul 24, 2012


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Posted on Jan 02, 2017


Mark L. Roberts Jr.

  • 710 Answers

SOURCE: temp gauge

Coolant temp sensor should be on the drivers' side of the motor on the lower portion of the aluminum head. I think the wires are black and yellow if my memory serves me well.

Posted on Apr 25, 2009


  • 3940 Answers

SOURCE: Oxy Sensor

Makes 100% sense to me

I have a 1999 SL1 that I'm having a field day with. I installed a OEM cruise control on the car, took it to the dealer and had them program the PCM to see the cruise.

Cruise works flawlessly, but now I have a Service Engine Soon and Service Lights on all the time (Crank position sensor error and 1 cylinder missfire error) that the dealer cannot get to reset (Car runs perfectly) Dealer has worked on it 4 days so far (at their cost, not mine) they seem to be stumped. I love it!

Posted on Aug 06, 2008


Dan De Groote

  • 35 Answers

SOURCE: my 1994 4 door saturn keeps overheating but still runs fine. .. .

Rather than take any chances the temp gage cost $10.00 at the parts store, and is relitively easy to replace. If you have not changed the fluid lately, I would do this as well. I just recently did this in my garage with a 10mm box wrench and ratchet using a flashlight to help see. The 6mm bolts may be a little tough to get at,but it is doable. I replaced the thermostate and fluid for around $20.00. Also, if it is a DOHC look on the drivers side on the head, you should see a temp sensor, if you replace that as well, you will have taken care of all the possible heat related parts on the vehicle. MAke sure to partially drain the system if you want to check the sensor, as fluid will run out if you dont. I also think that there is a resistance reading which you can check to see if the sensor is good, butunfortanuately I do not recall what the ohm reisitance is that can be read with an Ohm meter if you have one. Check out u-tube for additional information as well, they may have a hands on video to follow and explain. Good luck, I have 220000 mi on my car, running strong

Posted on May 27, 2009



  • 545 Answers

SOURCE: overheating

did u use oem thermostat or at local auto parts? if oem u ok,did put back the plug on temp sensor?did u burp the water line after you change thermostat?

Posted on Jun 05, 2009


  • 2 Answers

SOURCE: My radiator cooling fan is not working. I have

If you have A/C, you can check the system from the PCM output through the relay and to the fan motor by turning on the A/C and blower (with the engine on, of course): the cooling fan motor should turn on and stay on for several minutes.

Also, as you may know, this vehicle has a one-wire temperature sender that controls the dashboard gauge, but nothing else. (This one connects to a banded wire -- or maybe green/white banded.)

The other, two-wire temperature sensor is the one that connects to the PCM. This one has one yellow and one black wire. I assume that this is the one that you replaced.

And, in principle, there's the PCM itself that could be giving an inaccurate temperature... but that's expensive, so let's not go there...

- Roy

Posted on Oct 11, 2009

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Why my engine coolant temperature gauge stay to stucked to zero?

Could be a bad sensor, broken wire or corroded connection. Start with the easy/cheap stuff by doing an inspection of the wiring and connections. Then check the sensor. You could even try pulling the sensor and placing it in really hot water. Dont run the engine but turn the key so the gauges work. Sometimes they don't read if there is an air bubble stuck there.

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Coolant Temperature Gauge
The coolant temperature gauge is also operated by 2 coils. Battery voltage is applied to both coils. One coil is grounded directly and the other coil is grounded through the engine coolant temperature (ECT) sensor. The ECT has 55 ohms resistance at 127°C (260°F). The resistance becomes greater at low temperatures. The resistance is approximately 1400 ohms at 38°C (100°F). This causes the current through the sensor and one coil to increase as the coolant temperature increases. This moves the pointer.

Probably the coolant temp sensor . have you tried that ? No, relay in the circuit .

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Temperature needle stays on the hot , have changed temperature sensor but it still stays on the hot and the engine is not overheating or leaking anything..what is making it stay on the hot

replace the thermostat,, and make sure that the fan engages , just because the fluids don't boil over doesn't mean the temp isn't to high, if your saying that the temp gauge is stuck on the hot setting, and doesn't move even when the car is cold,, thats a different problem,, if thats the case whats the make , model , and year

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1 Answer

The original temp sensor was broken So I replaced it twice and it stillisnt working

Have you verified thet the temp gauge works? If not and you have a single wire going to the temp. guage sensor, you can ground the wire coming out of the temp gauge sensor, cut the ignition on, and verify the gauge peggs hot. If this doesn't happen, verify the integrity of the wire. If the wire is good, replace the gauge.

Jul 23, 2011 | 1996 Mercury Grand Marquis

1 Answer

There are two sensors connected to the thermostat housing and i need to know which sensor is which and what they control. on cold days i cant get started

The larger of the two is the coolant temperature sensor. The other is the actual gauge temperature sensor. The coolant temp. sensor gives information to the cars computor & when the car reaches a predetermined temperature, the computor changes the ignition timing allowing the car to run at normal operation temperature settings. The temperature sensor gives info to the dash board gauge &/or temp. warning light. The reason you can't start on cold days is that your coolant temp. sensor is stuck in advanced mode & the timing is to far advanced . To remedy this problem change the coolant sensor. Good luck!

Jan 04, 2010 | 2000 Ford Contour

2 Answers

Temperature gauge fluctuates and the heater blows cold air

Definitely check your fluid level in your radiator. Top it off all the way. I've seen that happen multiple times on cars that were low on anti-freeze. If that doesn't work try replacing your thermostat. It's cheap and the easiest place to start if topping off the fluid doesn't get you fixed up.

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temp sensor near thermostat with a wire connector tells your gauge reading or go to salvage yard to replace your temp gauge..

May 08, 2009 | 1996 Ford Escort 4 Door

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