Error Codes and Questions
Thread Starter
MBWorld Fanatic!
Joined: Apr 2016
Posts: 4,761
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From: Milwaukee, WI
2010 C300 4MATIC........ 2011 C63 AMG.............. 2015 CLS400 4MATIC.....
Error Codes and Questions
Engine light came on today, went to autozone, 3 codes
P0128 coolant thermostat - coolant temperature below thermostat regulating temperature (x2)
P2568 Direct ozone reduction catalyst temperature sensor circuit range/performance
Now, I just want to know
What I need to buy
How much does it cost
What is the problem
Any other helpful info, diy, etc.
Any help is appreciated, I gtg for now, will be using other car.
P0128 coolant thermostat - coolant temperature below thermostat regulating temperature (x2)
P2568 Direct ozone reduction catalyst temperature sensor circuit range/performance
Now, I just want to know
What I need to buy
How much does it cost
What is the problem
Any other helpful info, diy, etc.
Any help is appreciated, I gtg for now, will be using other car.
Last edited by Adi-Benz; Sep 9, 2016 at 05:17 PM.
Thread Starter
MBWorld Fanatic!
Joined: Apr 2016
Posts: 4,761
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From: Milwaukee, WI
2010 C300 4MATIC........ 2011 C63 AMG.............. 2015 CLS400 4MATIC.....
Someone said they changed battery, some just cleared codes, some replaced thermostat, etc. I have no idea what to do.
Funkwagen bro how do I clear codes? (or anyone else for that matter)
>
Funkwagen bro how do I clear codes? (or anyone else for that matter)
>
Thread Starter
MBWorld Fanatic!
Joined: Apr 2016
Posts: 4,761
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From: Milwaukee, WI
2010 C300 4MATIC........ 2011 C63 AMG.............. 2015 CLS400 4MATIC.....
yes I read it already, thanks, but p0128 they say replacing the thermostat is not always the case.
and I've done a google search. (not on mobile so not on couch anyway?)
and I've done a google search. (not on mobile so not on couch anyway?)
Junior Member
Joined: Apr 2015
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2010 C300 4Matic Sport
The thermostat is designed to fail open so the car doesn't overheat. When the car is up to operating temperature and the thermostat is functioning it will stay at 95 celsius but if the thermostat has failed it will likely stay at around 80 celsius (depending on ambient temperature).
Thread Starter
MBWorld Fanatic!
Joined: Apr 2016
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From: Milwaukee, WI
2010 C300 4MATIC........ 2011 C63 AMG.............. 2015 CLS400 4MATIC.....
The thermostat is designed to fail open so the car doesn't overheat. When the car is up to operating temperature and the thermostat is functioning it will stay at 95 celsius but if the thermostat has failed it will likely stay at around 80 celsius (depending on ambient temperature).
Any info on the other code?
Junior Member
Joined: Apr 2015
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2010 C300 4Matic Sport
A cursory search seems to indicate that the P2568 could be related to the failed thermostat as they're both coolant temperature related codes. If it were me I would replace the thermostat, clear the codes, and see if the P2568 comes back before trying to chase it down.
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Thread Starter
MBWorld Fanatic!
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From: Milwaukee, WI
2010 C300 4MATIC........ 2011 C63 AMG.............. 2015 CLS400 4MATIC.....
Yes, I found the same; btw, earlier I tried to clear the codes but the engine light kept up so didn't work. Guess I'll have to fix it first.
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Thread Starter
MBWorld Fanatic!
Joined: Apr 2016
Posts: 4,761
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From: Milwaukee, WI
2010 C300 4MATIC........ 2011 C63 AMG.............. 2015 CLS400 4MATIC.....
Yeah I was just worried about the thermo.
I also have to drive every weekday on highway for ~40 min going and then coming.
Glad its an easy fix and something relatively common I guess.
I also have to drive every weekday on highway for ~40 min going and then coming.
Glad its an easy fix and something relatively common I guess.
Junior Member
Joined: Apr 2015
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2010 C300 4Matic Sport
It should be fine because it's open meaning coolant is constantly flowing through the engine; just keep an eye on your engine temperature.
My thermostat went a couple of years ago and I drove around fine for a week or two until I was able to get it fixed.
My thermostat went a couple of years ago and I drove around fine for a week or two until I was able to get it fixed.
Super Member
Joined: Oct 2014
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From: Ontario, Canada
2009 C63 AMG, 2010 C250 4Matic Sport
Sorry I took too long to answer, looks like it won't resolve the problem anyway.
That being said, both codes look related to the thermostat - emissions won't be proper if the engine never reaches/doesn't stay within correct operating temperature because the thermostat has failed (and stuck open)
Thread Starter
MBWorld Fanatic!
Joined: Apr 2016
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From: Milwaukee, WI
2010 C300 4MATIC........ 2011 C63 AMG.............. 2015 CLS400 4MATIC.....
Update: Installed thermostat, about 1 hour job, not too bad.
Now to see if the light will go off soon, or if I'll have to clear the codes.
Now to see if the light will go off soon, or if I'll have to clear the codes.
Junior Member
Joined: Jun 2012
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From: Brooklyn NY/Norfolk VA/Trinidad
18 C300 4Matic.
My 2013 C300 just gave me that P2568 code, I recently had the radiator flushed and since then the fan has been going constantly it seems (and loud)
was the Fan a sign that something was wrong or about to be?
in the mean time Ill have a new Thermostat Unit installed.
was the Fan a sign that something was wrong or about to be?
in the mean time Ill have a new Thermostat Unit installed.
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From: SC
C300 4matic
