The dreaded Check Engine Light! If you have owned a car in the last 20 years, you have seen it from time to time. In this case it was on my wife’s 2012 C Class C250 Mercedes with 1.8 Turbo
The Check engine light was triggered by a Engine trouble code of P0128.
According to the web:
“The P0128 code means that the engine coolant is not getting warm enough, fast enough. In other words, there is a problem with the engine operating temperature not being reached within a certain amount of time. The Engine Control Module (ECM) determines this length of time based on ambient temperature.”
Ok so we know what the code is, what do you do now?
I say we fix it! Swap one part and you get a new housing, thermostat, and temp sensors to remedy the P0128 code on the C-class.
I hope this video helps clear your CEL and gets you back on the road.
This should work for most ever C-class with the same engine (but don’t take my word for it, ask a technician if you aren’t sure)
Thanks
#mercedes #P0128 #diy
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You are a great human for sharing this with us. Thank you man!!! Concise, quick, informative. Well done.
Great instructional video but it took me 4 hours to take off and put a new one on. Also I crack a small hose line which I have to repair because replacing is not an option.
Is that same as code p0597? Mercedes coupe C250 2015?
Thanks for the video what are the 5 bolts to the thermostat housings torque specs? Thanks in advance
Is this related to p059800
Thank you ,thank you , thank you . I'm getting an open circuit P code for the coolant temp sensor so your video shows me how to clear the path to it AND when I have to also replace the T stat I'll know how to do . And thanks for making it brief .
Bottom part of intake was hard to get off, now its just sliding off after replacing the thermostat housing. Do I need to replace it?
Finally, a video that helped!