P0128 Code
Thread Starter
Newbie
Joined: Aug 2024
Posts: 3
Likes: 0
2011 ML350
P0128 Code
I recently purchased a 2011 ML350 with 38000 miles on it. Mechanic checked it out and it had the P0128 code. I did some research and went ahead with the purchase. I now wanted to get the code addressed and in the past. I just replaced the battery. According to my cars gauge, my coolant temp is 95C give or take a few degrees when warmed up. I assume that means it is not the thermostat. What should I look at next? Thanks for the help.
Senior Member
Joined: Apr 2007
Posts: 436
Likes: 79
Former R230, W220 and W221 owner
I recently purchased a 2011 ML350 with 38000 miles on it. Mechanic checked it out and it had the P0128 code. I did some research and went ahead with the purchase. I now wanted to get the code addressed and in the past. I just replaced the battery. According to my cars gauge, my coolant temp is 95C give or take a few degrees when warmed up. I assume that means it is not the thermostat. What should I look at next? Thanks for the help.
It could be because of low coolant level, bad thermostat, or an issue with the coolant temperature sensor, clogged radiator....
needs to be properly diagnosed
Last edited by imtheking; Aug 15, 2024 at 11:49 AM.
Thread Starter
Newbie
Joined: Aug 2024
Posts: 3
Likes: 0
2011 ML350
check engine light is on. It was a stored code and then popped up a day ago.as CEL. I was aware of the problem and had read that it's either the thermostat, the coolant temp sensor or the battery. Battery was low on CCA and voltage and was replaced.
