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Engine coolant temperature sensor

Tiny
JOHN J66
  • MEMBER
  • 2010 MERCEDES BENZ ML350
  • 6 CYL
  • AWD
  • AUTOMATIC
  • 108,000 MILES
Hello, I was trying to find the location of the sensor due to the fact I had the engine light come on. It is a p0128 code, which Autozone said is either thermostat or sensor so I figured I would change both. Thanks.
Sunday, May 22nd, 2016 AT 7:37 PM

5 Replies

Tiny
SATURNTECH9
  • MECHANIC
  • 30,870 POSTS
Do you have a 3.0 or 3.5L engine? More then likely it is a bad thermostat all the code P0128 I have seen on all different make cars has been a bad thermostat.
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Sunday, May 22nd, 2016 AT 10:41 PM
Tiny
JOHN J66
  • MEMBER
  • 3 POSTS
Thanks, I will check the engine, not sure what, but I figured the sensor was not expensive so I would just change it when I change thermostat. I still need to find out where the sensor is located. Appreciate the response.
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Monday, May 23rd, 2016 AT 4:21 AM
Tiny
SATURNTECH9
  • MECHANIC
  • 30,870 POSTS
On the emissions label under the hood it should tell you what size the engine is.
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+1
Monday, May 23rd, 2016 AT 10:18 AM
Tiny
JOHN J66
  • MEMBER
  • 3 POSTS
Thanks, I will check under the hood.
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Monday, May 23rd, 2016 AT 11:27 AM
Tiny
SATURNTECH9
  • MECHANIC
  • 30,870 POSTS
You are welcome.
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Monday, May 23rd, 2016 AT 12:17 PM

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