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LBL300 01-29-2009 10:19 PM

Code p128
Got a code p128 on my wife's 03 L300. Cleared the code and it came back a few days later. Cleared it again and it hasn't come back on since. It has the V6 and 130K. I can't find anywhere that will tell me what this code means, can anyone help?


ssicarman 01-29-2009 10:49 PM

Re: Code p128
It means that you need to replace the thermostat.

bdrake 01-31-2009 04:11 AM

Re: Code p128
Yep, it's the thermostat. The good news is that if your engine isn't overheating, and if you don't live in a freezing climate, you can ignore it until next year, when you have to get the car smogged (or until you sell it). I drove my car for about 18 months with the P0128 code; I live in Southern California.
Replacing it is not a fun job; the thermostat is under the intake plenum.


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