Volvo 670 coolant level sensor

Either sensor is bad or your surge tank is bad one of the two the only way to fix is try to replace sensor you can do it yourself very easy one clamp holding sensor in loosen clamp and pull out sensor toward bottom no coolant will leak so don't worry install new one start truck clear codes and see if it goes away if not then either surge tank is bad or need to trace wiring

 

I had the same problem....it was just the coolant sensor acting up from time to time. Never consistent right. That'll fix it.

 

Ya i'm sure that's what the problem is. Mine would say "check coolant at next stop". So me being cautious, I would pull over, pop my hood and the coolant level would be fine. Mine would sometimes show the check coolant on the screen then after a few miles it would go out then a little while later it would come back on again. So once again, I pull over and check the level again and it would be fine. Then it bugged me soo much that I would start looking all over the motor for coolant leaks. The only sensor that tells the level or will throw a "check coolant level at next stop" on the screen is that sensor. I've put two of them in my truck now. Actually just put one in a few weeks ago and the one before that last summer. Its around $50 and literally takes 5 mins to change. I would start there before anything else

 

good deal...glad to hear you got it fixed.

 

I replaced the coolant sensor and reservoir tank but the code remains on... and I've just been driving on. Now I just got a "light" error code but everything is still working. "Stop engine coolant critically low"