New to the Forum. Trying to fix a problem with 05 magnum 3.5l. CEL came on Code P0128. Change the TStat. Coolant sensor and antifreeze. Cleared the code. About 100 miles later CEl came back on same code . Temp reaches about a 1/4 way and stops. When driving there have been times the temp gauge drops under 1/4. If Anyone knows how to fix this problem please let me know.
I have checked coolant level and it is fine. I did bleed the system twice.
Check engine light came on again yesterday. Any Ideas on how to fix is greatly appreciates