Question about 2003 Saturn VUE

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My 'service engine soon' light came on, then went off a couple of weeks later. It came back on and I had it scanned by a mechanic. The p0128 code came up. He reset the onboard computer and it went off but it came back on again shortly. He said it would be at least $500 to replace the engine coolant thermostat. He also asked if the heat worked in the car and I said it works great. I have no problems. The temp gauge seems to be working fine as well. I called Saturn and the repair dept said this could be just a faulty sensor. I am trying to find this part and would like to know if I need to take it to the dealer. And I am hoping to know better if it only is a sensor issue.

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  • wlplayer909 Apr 05, 2009

    i have a 2002 nissan sentra gxe and my service engine light came on about a month ago. code p0128 came on. i changed my oil to 5w and used premium *** right after and it went off. just the other day it came on but it was also cold out and i got it read again and same code p0128. what do you think i should do? not worry about it? or change my sensor and thermostat?



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I have a 2003 saturn vue which repeatedly gave me the P0128 code. I replaced the water pump, and ultimately had to replace the thermostat. The water pump is a $40 part, the thermostat is a $25 part. Problem is that its a 4 hour job by chilton timeframe. If you have the know how you can do it yourself on a saturday afternoon, however if your not familiar with playin with a Saturn, better take it to a professional.

Posted on Jun 09, 2009


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