[Hoseee]

I have changed the thermostat 3 times. I still get p0597. Finally figured out that I’m not getting any ground from the blue wire that connects to the thermostat. So I rigged it so it grounds to the engine. Now the heater works but still get the code and sometimes it try’s to over heat but the fan kicks on. My questions is does it have to be grounded from the original blue wire from the harness that leads to the ecm or it shouldn’t matter? Or is it a an ecm issue? Yesterday it was also over heating and all the coolant started to evaporate from the reservoir and now that I refilled it the fan is stuck on. Any help?
Btw car is a 1.8 2015 car is salvage and was hit on the front driver side

 

[JLL]

There is a patch of bare wire going to the sensor in your picture.

 

[Hoseee]

There is a patch of bare wire going to the sensor in your picture.

That’s the positive. I’m getting a reading from that wire the loose blue one is the ground

 

[JLL]

From the picture of your scanner, you have an open circuit. That can be from power or ground. Did you test your rigged ground for continuity?

 

[Hoseee]

From the picture of your scanner, you have an open circuit. That can be from power or ground. Did you test your rigged ground for continuity?

No I didn’t I’m going to the get a multimeter tomorrow and test. It should have continuity right ?

 

[JLL]

Yes. What want to do is set the meter on the continuity setting. Then put on probe on the negative battery terminal and the other probe on the eyelet of you ground wire while it's bolted down. If there is continuity, the meter will signal continuity. Most of them beep to signal this but read your multimeter's user manual. If the meter does not signal continuity, check you wiring connections for continuity. If those signal continuity, the place you choose as a ground wasn't grounding so you'll need to choose a different spot. Make Sense?

 

[Hoseee]

Yes. What want to do is set the meter on the continuity setting. Then put on probe on the negative battery terminal and the other probe on the eyelet of you ground wire while it's bolted down. If there is continuity, the meter will signal continuity. Most of them beep to signal this but read your multimeter's user manual. If the meter does not signal continuity, check you wiring connections for continuity. If those signal continuity, the place you choose as a ground wasn't grounding so you'll need to choose a different spot. Make Sense?

Okay checked it. the ground is fine I also took the time to check my fan because it only runs on the high setting both the low and medium settings do not work. Do you think maybe that’s what causing the code?

 

[JLL]

Which fan are you referring too?

 

[Hoseee]

Which fan are you referring too?

Radiator fan

 

[JLL]

I doubt the fan is causing the code, however the code is probably causing the issue with the fan. What temperature are you reading for ECT?

 

[JLL]

Also what other codes are you getting? I noticed that P0597 is code 2/6.

 

[Hoseee]

Also what other codes are you getting? I noticed that P0597 is code 2/6.

ECT is reading about 238-240 and that’s when the fan kicks on. Shouldn’t the medium/low speed kick on about 225

 

[JLL]

238-240 is really high. Do you know is that an accurate temperature? If so, I would be concerned with why it's so hot. I'm not sure the exact temperatures that the fan speeds start at. Does anyone else know?

 

[Hoseee]

238-240 is really high. Do you know is that an accurate temperature?

Yes accurate got it from the scanner unless the sensor is bad.

 

[JLL]

Use an infrared thermometer to get an accurate temperature. If it is 238-240 I would be trying to figure out why the engine is running so hot.

 

[Hoseee]

Yes accurate got it from the scanner unless the sensor is bad.

Use an infrared thermometer to get an accurate temperature. If it is 238-240 I would be trying to figure out why the engine is running so hot.

the multimeter that I bought came with a thermometer you think I could use that to check temperature? Also, another issue is when I’m driving in the highway the car doesn’t go up to operating temperature

 

[Hoseee]

 

[JLL]

You can try it, but that's more designed to read wire temperature, not coolant temperature.

 

[Hoseee]

the multimeter that I bought came with a thermometer you think I could use that to check temperature?

You can try it, but that's more designed to read wire temperature, not coolant temperature.

Okay I’ll go out tomorrow and get one. what part of the engine should I point it ? Also, could it be the ecm? I’m so lost on why just fixing the ground didn’t fix my issue i was also thinking maybe it’s the wiring harness?

 

[Hoseee]

Also what other codes are you getting? I noticed that P0597 is code 2/6.

Sorry just seen this. I’m only getting p0597 and p0420 they’re are permanent pending and on going