Join Date: Jan 2005
Location: Winter Haven, Florida
Re: Engine Light - Thermostat or Cooling Sensor?
Hey, DBNissan, or anyone, really.
I "think" I saw this code come up before when we got hit by a nice cold blast last week. I didn't think anything of it so I just reset it. but I'm pretty sure it was the same P0128 code. During normal driving, my thermostat never reaches the first 1/4 mark. Matter of fact, this whole week in the 50s that temp needle never exceeded the halfway point between the Cold line and the first 1/4 mark line. If it was truly P0128, how long would it take for the CEL to come back on? I haven't had it on for 5-6 days now, and it's been 50's-60's every morning and evening...
It "seems" to me like I'm getting slightly better fuel economy this way...but what are some of the cons of leaving a stuck-open thermostat on?
ALSO, please be advise, I did a flush 2 years ago and filled up with 2 bottles of Redline Water Wetter, topped off the rest with 50/50 GM Coolant. About once a year the reserve drops under the full-cold line by one-finger or so and I just top off again.
It's funny because when I checked it then it was fine and I put it in the correct way in...or at least I think I did...I "think" the spring-mechanism goes facing away from the engine...but honestly I can't remember, I just know however it came out I put it back in the same exactly way.
any advise would be greatly appreciated.
2004 Colorado RegCab ZQ8
I5, 3.42, 5sp
Dynomax SuperTurbo Muffler
Volant CAI w/ RamAir
HPTuners custom tune
200 RWTQ @ 4,200 RPM
207 RWHP @ 5,800 RPM