2011 ML550 check engine light P0128 code
11-16-2015, 05:46 PM
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2011 ML550
2011 ML550 check engine light P0128 code
The check engine light came on and the OBDII code reads P0128 "Coolant Thermostat (coolant Temp Below Thermostat Regulating Temperature". I want to change the sensor since this is the cheapest way to experiment, before looking into changing the thermostat. Can someone tell me where the sensor is located on a 2011 ML550? A picture would greatly be appreciated. I'd googled it and doesn't seem to get anywhere. Thanks in advance for your help.
