The coolant light in my 2001 Saturn SL1 came on. I was advised to replace the water pump and temperature gauge. I did and the light went off. A short time later, the light came back. Diagnostics did not point to other causes for the light so it was suggested that it was a fuse. It has been a year since I replaced the water pump and temperature gauge. No overheating has occurred but the light remains steady. Any suggestions on the light? Also, how often should I replace the water pump and gauge?
Thank you for writing into Askpatty!! At times, a coolant light comes on due to low coolant in the reservoir. Try topping the jug to the full mark,
〉 Answered on May 20th, 2013 by Amanda J. Pierce, MBA "AJ", Certified Mechanic, Project Coordinator; Primavera Scheduler at VIGOR Alaska Industrial Shipyard & BizzM3ch Solutions
Sometimes the level sensor (I am assuming it is a low coolant light) sticks in the reservoir. Check the coolant level. If the level is good, it may be the fluid level sensor. Usually the sensor is one piece with the reservoir, on some models it may be serviced seperatly. The water pump and gauge should not have to be replaced unless there is an issue. Check your owners manual for suggested or required service intervals.
〉 Answered on May 20th, 2013 by Helaine Kurot, Owner/Technician at 360 Automotive