CEL P0128, need help!
Thread Starter
Senior Member
Joined: Oct 2007
Posts: 260
Likes: 0
From: Los Angeles
05 C230 Kompressor
CEL P0128, need help!
Hey guys, have a quick question
It began back around 3 months ago. Got it once, didn't see it for at least almost 2 months later again (CEL). Brought up P0128 again. After that it took 3 weeks later to get it again. And then another time took exactly a week later. Now recently, it comes up every 2-4 days. My temp gauge can vary from 78ish degrees to about 84 depending the weather.
Is this indicating a stuck Thermostat? or bad sensor? I'd greatly appreciate your time of input on this one. If it is one of the two, is there a picture walk through or idea where i can find this in my engine bay to service it? Don't believe i need a dealer or mechanic to do this. I've done work on another car before i owned this one.
Also, a place where i can buy either of the parts?
Chris
It began back around 3 months ago. Got it once, didn't see it for at least almost 2 months later again (CEL). Brought up P0128 again. After that it took 3 weeks later to get it again. And then another time took exactly a week later. Now recently, it comes up every 2-4 days. My temp gauge can vary from 78ish degrees to about 84 depending the weather.
Is this indicating a stuck Thermostat? or bad sensor? I'd greatly appreciate your time of input on this one. If it is one of the two, is there a picture walk through or idea where i can find this in my engine bay to service it? Don't believe i need a dealer or mechanic to do this. I've done work on another car before i owned this one.
Also, a place where i can buy either of the parts?
Chris
Member
Joined: Mar 2008
Posts: 219
Likes: 1
From: Kansas City, MO
'05 C230K SS
I just got a CEL yesterday, scanned it, and got the same code. I called my SA at the dealer, and he said the thermostat is definitely covered under the CPO (I've got about 3 months left). So, if you're lucky enough to still be covered, then I would just take it in.
I believe the thermostat is #55/63/65 on this diagram, but I could very easily been wrong (I've never changed one). Someone who knows for sure will definitely chime in before long.
While researching it myself last night, I didn't find any DIY's specific to the W203, but there is a series of instructional videos on YouTube on the same issue.
http://www.youtube.com/watch?v=oR9cy...eature=channel
I believe the thermostat is #55/63/65 on this diagram, but I could very easily been wrong (I've never changed one). Someone who knows for sure will definitely chime in before long.
While researching it myself last night, I didn't find any DIY's specific to the W203, but there is a series of instructional videos on YouTube on the same issue.
http://www.youtube.com/watch?v=oR9cy...eature=channel
Super Moderator
Joined: Jun 2008
Posts: 19,942
Likes: 192
From: Llandudno, Cape Town, South Africa
late 2009 CLK 350 Coupe Elegance, '65 Jaguar S Type wires
Hey guys, have a quick question
It began back around 3 months ago. Got it once, didn't see it for at least almost 2 months later again (CEL). Brought up P0128 again. After that it took 3 weeks later to get it again. And then another time took exactly a week later. Now recently, it comes up every 2-4 days. My temp gauge can vary from 78ish degrees to about 84 depending the weather.
Is this indicating a stuck Thermostat? or bad sensor? I'd greatly appreciate your time of input on this one. If it is one of the two, is there a picture walk through or idea where i can find this in my engine bay to service it? Don't believe i need a dealer or mechanic to do this. I've done work on another car before i owned this one.
Also, a place where i can buy either of the parts?
Chris
It began back around 3 months ago. Got it once, didn't see it for at least almost 2 months later again (CEL). Brought up P0128 again. After that it took 3 weeks later to get it again. And then another time took exactly a week later. Now recently, it comes up every 2-4 days. My temp gauge can vary from 78ish degrees to about 84 depending the weather.
Is this indicating a stuck Thermostat? or bad sensor? I'd greatly appreciate your time of input on this one. If it is one of the two, is there a picture walk through or idea where i can find this in my engine bay to service it? Don't believe i need a dealer or mechanic to do this. I've done work on another car before i owned this one.
Also, a place where i can buy either of the parts?
Chris
I'm trying to find procedure - will post.
Super Moderator
Joined: Jun 2008
Posts: 19,942
Likes: 192
From: Llandudno, Cape Town, South Africa
late 2009 CLK 350 Coupe Elegance, '65 Jaguar S Type wires
Here - Hope this helps:
BTW - Thermostat should maintain 87 Deg C
BTW - Thermostat should maintain 87 Deg C
Last edited by Glyn M Ruck; Feb 16, 2009 at 11:27 AM.
Member
Joined: Mar 2008
Posts: 219
Likes: 1
From: Kansas City, MO
'05 C230K SS
Thanks Glyn. I guess I was right about the part and number. It's available at autohausaz.com for $32.93 plus shipping.
Since I'm still under warranty, I'm just taking mine in tomorrow morning. Might as well get a free car wash. I just hope that's all it is.
Since I'm still under warranty, I'm just taking mine in tomorrow morning. Might as well get a free car wash. I just hope that's all it is.
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Thread Starter
Senior Member
Joined: Oct 2007
Posts: 260
Likes: 0
From: Los Angeles
05 C230 Kompressor
Sorry to bring back an old thread of mines, is there a website that i can get MB parts for my vehicle? I think its time i really change the Thermostat now. Its starting to scare me. lol
Let me know of any websites that have good deals on parts like Thermostats, oil, filter, etc... maintenance stuff you know...
Thanks again guys!
Chris
Let me know of any websites that have good deals on parts like Thermostats, oil, filter, etc... maintenance stuff you know...
Thanks again guys!
Chris
Thread Starter
Senior Member
Joined: Oct 2007
Posts: 260
Likes: 0
From: Los Angeles
05 C230 Kompressor
With a bit of searching i actually found a place no more than 15-20 miles from my place...
Called
Caliber Mercedes Benz of Anaheim... They were able to get me a thermostat for 25 bucks and oil filter for 13 dollars. Is that good?
And for those who aren't local, here's a website i believe:
http://www.trademotion.com/partlocat...?siteid=214269
Called
Caliber Mercedes Benz of Anaheim... They were able to get me a thermostat for 25 bucks and oil filter for 13 dollars. Is that good?
And for those who aren't local, here's a website i believe:
http://www.trademotion.com/partlocat...?siteid=214269
Thread Starter
Senior Member
Joined: Oct 2007
Posts: 260
Likes: 0
From: Los Angeles
05 C230 Kompressor
Location of Thermostat on C230 Kompre M271
Hi guys. I cannot seem to find the thermostat on my engine. 2005 C230 Kompressor.
Any chance any one can walk me through this or post up a picture with like a red circle circling where i can find it and what tool i will need to do this job? I only bought the thermostat itself (came with 2 "O" rings).
Thanks
P.S. having a hard time finding it.
Chris
Any chance any one can walk me through this or post up a picture with like a red circle circling where i can find it and what tool i will need to do this job? I only bought the thermostat itself (came with 2 "O" rings).
Thanks
P.S. having a hard time finding it.
Chris
Thread Starter
Senior Member
Joined: Oct 2007
Posts: 260
Likes: 0
From: Los Angeles
05 C230 Kompressor
***This is just my personal walkthrough, shouldnt be taken as professional advice or way of repair***
After a bit of frustration, i found it lol
Just follow the upper radiator hose(towards the engine block) to get to the housing. Remove the two screws and the wire clamp with a flat screw driver. After getting those 3 things off, this is where most of the labor comes in, pull out (while wiggling the plastic thermostat housing up and down left and right), the plastic housing will come right off and you will have your thermostat showing. Install new housing (take note of which direction the little pi is *mines was pointing upwards). To re-install, reverse the above steps. You're finished.
I only used a 8mm click thingy wrench to remove the two longs bolts on the housing and the top little cover to get better access. Thats all i needed. Everything cost me 28 dollars with tax doing it on your own. Time was 35 minutes (first time doing this, 2nd time should be no more than 10-15 mins with everything)
Just a FYI for you DIYourselfers!
http://img155.imageshack.us/img155/2...ictures001.jpg
After a bit of frustration, i found it lol
Just follow the upper radiator hose(towards the engine block) to get to the housing. Remove the two screws and the wire clamp with a flat screw driver. After getting those 3 things off, this is where most of the labor comes in, pull out (while wiggling the plastic thermostat housing up and down left and right), the plastic housing will come right off and you will have your thermostat showing. Install new housing (take note of which direction the little pi is *mines was pointing upwards). To re-install, reverse the above steps. You're finished.
I only used a 8mm click thingy wrench to remove the two longs bolts on the housing and the top little cover to get better access. Thats all i needed. Everything cost me 28 dollars with tax doing it on your own. Time was 35 minutes (first time doing this, 2nd time should be no more than 10-15 mins with everything)
Just a FYI for you DIYourselfers!
http://img155.imageshack.us/img155/2...ictures001.jpg
Last edited by seagel1000; Mar 24, 2009 at 06:31 PM.
Member
Joined: Jan 2007
Posts: 226
Likes: 2
From: Toronto, Ontario
'15 C400, 03' C240, '79 240D
Is there a way to tell if your thermostat is not functioning properly without visually inspecting it?
And if your do take it out to inspect...how do you know if its necessarily bad?
Thanks
And if your do take it out to inspect...how do you know if its necessarily bad?
Thanks
Junior Member
Joined: Mar 2009
Posts: 23
Likes: 0
From: Beaverton, OR
Silver 2005 C230k
Normally if the thermostat is not functioning properly, your temp gauge will not be halfway where it's supposed to, even after your car has warmed up. Also, if you squeeze the piping, it should be hot. Another way is that the heater doesn't blow hot when on full blast.
Thread Starter
Senior Member
Joined: Oct 2007
Posts: 260
Likes: 0
From: Los Angeles
05 C230 Kompressor
MBWorld Fanatic!
Joined: Aug 2007
Posts: 1,545
Likes: 87
From: San Jose, CA
2010 c300
My engine light has been on for a few weeks and the dealer said it was the thermostat but I don't notice the temp going up higher than normal. Heater blows hot air fine. Did they misdiagnose? My SA seems pretty honest but again I've only gone to him 2x so far. He qouted me $380 for a $29 job? wtf. This sounds like a very easy DIY. I might just do it myself. Thanks for the info guys.
Edit: Whew...my Nissan extended warranty is covering it. But good info to know non the less!
Edit: Whew...my Nissan extended warranty is covering it. But good info to know non the less!
Last edited by aznmode; Mar 26, 2009 at 02:30 PM.
MBWorld Fanatic!
Joined: Aug 2007
Posts: 1,545
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From: San Jose, CA
2010 c300
http://img155.imageshack.us/img155/2...ictures001.jpg
Super Moderator Alumni
Joined: Oct 2002
Posts: 8,692
Likes: 58
From: So Cal.
2019 GT3 RS, 2017 M3 30 Jahre
If you click on his picture web link it's a larger size. Unless your broswer is shrinking it to fit the screen.
http://img155.imageshack.us/img155/2...ictures001.jpg
http://img155.imageshack.us/img155/2...ictures001.jpg
thanks!
Thread Starter
Senior Member
Joined: Oct 2007
Posts: 260
Likes: 0
From: Los Angeles
05 C230 Kompressor
My engine light has been on for a few weeks and the dealer said it was the thermostat but I don't notice the temp going up higher than normal. Heater blows hot air fine. Did they misdiagnose? My SA seems pretty honest but again I've only gone to him 2x so far. He qouted me $380 for a $29 job? wtf. This sounds like a very easy DIY. I might just do it myself. Thanks for the info guys.
Edit: Whew...my Nissan extended warranty is covering it. But good info to know non the less!
Edit: Whew...my Nissan extended warranty is covering it. But good info to know non the less!
MBWorld Fanatic!
Joined: Aug 2007
Posts: 1,545
Likes: 87
From: San Jose, CA
2010 c300
Thanks. It is simple and it's even easier than replacing thermostat on my integra. But I already brought it in to the dealer last night for a tranny flush and that was one thing I wanted them to check on.
Super Moderator
Joined: Jun 2008
Posts: 19,942
Likes: 192
From: Llandudno, Cape Town, South Africa
late 2009 CLK 350 Coupe Elegance, '65 Jaguar S Type wires
