P0128 advice....

Discussion in 'Dodge Challenger General Discussions' started by LEGENDARY70, Nov 11, 2019.

  1. LEGENDARY70

    LEGENDARY70 Member

    Posts:
    7
    Likes Received:
    0
    Joined:
    Oct 27, 2019
    Location:
    TEXAS!
    hello all.

    autozone got the code above. in his experience it usually happens when it gets cold out and it is 30 degrees out and the check engine light came on. Been doing some reading and 90% of the time it is the tstat.
    Any other advice yall might have?
    I did notice the temp gauge takes a while to start moving to the center position.....
    Heater works fine inside the car.
    Any videos out their on how to change the tstat?

    thx
     
  2. LEGENDARY70

    LEGENDARY70 Member

    Posts:
    7
    Likes Received:
    0
    Joined:
    Oct 27, 2019
    Location:
    TEXAS!
    How many bottles of antifreeze does the 2010 challenger srt8 take? Brand of antifreeze I should use? 50/50? thx
     
  3. SRT-Tom

    SRT-Tom Full Access Member Article Writer

    Posts:
    3,054
    Likes Received:
    624
    Joined:
    Oct 2, 2011
    Location:
    southern New Jersey
    A P0128 trouble code is probably a faulty tstat, but it could also be:

    Low engine coolant level
    Faulty cooling fan (running too much)
    Faulty coolant temperature (ECT) sensor
    Faulty intake air temperature (IAT) sensor

    I couldn't find a video for a 6.1 tstat replacement, but this one for a 5.7 should help. The coolant capacity for a 6.1 is 14.8 quarts.

     
  4. IntimidatorRT

    IntimidatorRT Well-Known Member Staff Member Super Moderator

    Age:
    64
    Posts:
    1,096
    Likes Received:
    313
    Joined:
    Aug 8, 2017
    Location:
    Rosepine,LA.
    owners manual will tell you too........just sayin.
     
  5. LEGENDARY70

    LEGENDARY70 Member

    Posts:
    7
    Likes Received:
    0
    Joined:
    Oct 27, 2019
    Location:
    TEXAS!
    thanks