Check engine light help
Thread Starter
Junior Member
Joined: Jul 2013
Posts: 55
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07 Acura Tsx, 2009 C300 L
Check engine light help
Today I had a friend of mine check the check engine light that I had. It's been on for the past two weeks and prior to that it was on for a few days and then went off. The code he got was p0128. It says engine coolant temp a ture or thermostat... If it was the thermostat wouldn't my car over heat? Or maybe it's just running bad ? Any suggestions on what I should do
Newbie
Joined: Feb 2014
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c300
coolent temp
my engine light's on for two weeks every since outside temp dip below 0; diagnostic code came back as PO128; ---> "coolent temp below operating range"... and on some days after driving 20 minutes there is warmth on the side of console but not everyday
Newbie
Joined: Jan 2013
Posts: 11
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2008 C350 Sport
I had a CEL as well and pulled the same code. Just because your car is not overheating doesn't mean your thermostat is not messed up. Mine just so happened to be stuck in the open position. You will need a new thermostat.
Member
Joined: Nov 2012
Posts: 134
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From: Montreal
C350 2010, BMW 325i 2001, Porsche turbo 996 2002.
Just had this failure and realized the temp was lower than normal about 80 C instead of 95. Had to replace the thermostat. $112.00 and did the job myself which is not difficult….
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Member
Joined: Nov 2012
Posts: 134
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From: Montreal
C350 2010, BMW 325i 2001, Porsche turbo 996 2002.
The part# depend of your Vin# but it can be 2722000415. There are two good sources of information which is a video and a pdf: https://mbworld.org/forums/c-class-w...w203-c280.html and
. Of course the pdf is a W203 but very similar to the W204…In my case, I've never found the radiator drain plug and decided to let it drain from the thermostat housing….One gallon of coolant was sufficient since you mix it 50/50….
Last edited by jpflip; Feb 16, 2014 at 10:53 AM.
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Thread Starter
Junior Member
Joined: Jul 2013
Posts: 55
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07 Acura Tsx, 2009 C300 L
I appreciate the link to the pdf and how to. Do you know if driving like this for another few more days can mess anything up? Until the weather clears up for me to install it
Member
Joined: Nov 2012
Posts: 134
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From: Montreal
C350 2010, BMW 325i 2001, Porsche turbo 996 2002.
No problem to drive with a stuck open thermostat. If your temp is lower than normal it will affect you fuel consumption more than anything else. But if your thermostat is stuck close that can be a problem because your engine will eventually overheat. Keep an eye on the temp!
Super Member
Joined: Jan 2008
Posts: 702
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From: Illinois
'08 C300 4Matic Sport, '02 530i
I'm seeing it for under $100 online. The dealer obviously throws in their mark-up. Not unusual. Anything you buy from the dealer will be overpriced.
Last edited by Pete7874; Feb 19, 2014 at 04:40 PM.
Super Member
Joined: Jan 2008
Posts: 702
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From: Illinois
'08 C300 4Matic Sport, '02 530i
You will eventually get excessive moisture and fuel contamination in your engine oil as the temps aren't high enough to burn them off. Don't wait too long as this can cause permanent breakdown of your oil and you will need to change it.
Member
Joined: Dec 2010
Posts: 215
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From: Montreal
2009 C300 4Matic Sport + Premium 2
Well, the engine light came on for me as well this morning. 5 mins later I was at the dealer. Thermostat failure. Seems like a common problem after a few years and happens especially during the harsher winter months. It explains why my car temp was running low in the past 2 weeks and I had low heat in the car.
Some work I do myself but this time I had no time. I went to an indie benz shop. Total cost (tax in) was $528 which includes thermostat, labor, star diag reset, new coolant.
Some work I do myself but this time I had no time. I went to an indie benz shop. Total cost (tax in) was $528 which includes thermostat, labor, star diag reset, new coolant.
Last edited by RavenMDX; Feb 20, 2014 at 02:48 PM.
Member
Joined: Dec 2010
Posts: 215
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From: Montreal
2009 C300 4Matic Sport + Premium 2
well, I knew it was going to be a few hundred. The breakdown they gave me is as follows:
thermostat with housing $195
coolant $22
star diagnostic and reset $107 (yikes)
labor $135
wash $0
tax $68 (tax is crazy here)
total approx $528
Last edited by RavenMDX; Feb 20, 2014 at 03:06 PM.
Super Member
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Posts: 702
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From: Illinois
'08 C300 4Matic Sport, '02 530i
...
MBWorld Fanatic!
Joined: Jul 2012
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From: Canada
07 E63 + 07 CLK63CAB
I might have jumped the gun, all seems good except for the fault code/reset, probably took 1 minute. Dealer does for same price, but oh well it is done.
Actually a lot better to have low heat so the stat fails open than to have it fail closed and overheat the engine. Seems to be a common issue with these thermostats.
Do you not have 13% tax in Montreal? or is it 15%
Actually a lot better to have low heat so the stat fails open than to have it fail closed and overheat the engine. Seems to be a common issue with these thermostats.
Do you not have 13% tax in Montreal? or is it 15%
Member
Joined: Nov 2012
Posts: 134
Likes: 4
From: Montreal
C350 2010, BMW 325i 2001, Porsche turbo 996 2002.
Just realized you were from Montreal! I did this job on my car last week and it cost me total $170.00 and did the reset with a generic Innova OBD tool that I bought at Canadian tire… Got robbed lately by Silverstar Mercedes dealer in Montreal, they will never see me again for anything!!!! I am sorry for you….
Member
Joined: Dec 2010
Posts: 215
Likes: 3
From: Montreal
2009 C300 4Matic Sport + Premium 2
I might have jumped the gun, all seems good except for the fault code/reset, probably took 1 minute. Dealer does for same price, but oh well it is done.
Actually a lot better to have low heat so the stat fails open than to have it fail closed and overheat the engine. Seems to be a common issue with these thermostats.
Do you not have 13% tax in Montreal? or is it 15%
Actually a lot better to have low heat so the stat fails open than to have it fail closed and overheat the engine. Seems to be a common issue with these thermostats.
Do you not have 13% tax in Montreal? or is it 15%
its closer to 15% now...
Member
Joined: Dec 2010
Posts: 215
Likes: 3
From: Montreal
2009 C300 4Matic Sport + Premium 2
Just realized you were from Montreal! I did this job on my car last week and it cost me total $170.00 and did the reset with a generic Innova OBD tool that I bought at Canadian tire… Got robbed lately by Silverstar Mercedes dealer in Montreal, they will never see me again for anything!!!! I am sorry for you….
Thanks for the tip on the Innova, I will get myself one too.
Cheers
Thread Starter
Junior Member
Joined: Jul 2013
Posts: 55
Likes: 1
07 Acura Tsx, 2009 C300 L
Hey guys my check engine light turned off by its self...the heat is blowing out hotter air than before. Should I go back and return the thermostat as I didn't use it or replace it? We had warmer weather than usual today if that helps
Member
Joined: Nov 2012
Posts: 134
Likes: 4
From: Montreal
C350 2010, BMW 325i 2001, Porsche turbo 996 2002.
You better keep it!!!\ You will eventually need it !!!!
