OBD II Trouble Code Po128
Getting trouble code P1028. Have replace the ECT. Cleared code and less than week later code back. Temperature guage appears normal (~195 degrees when warmed up). Is there another temp sensor somewhere as the code will clear on its own if the outside temp is below 45 degrees. Manual states that ECT acts as both the temp sending unit and input for PCM. What should next step be?
2006 Silverado, 4.3L V6 with approximately 85K.
Last edited by jcolpaert; 03-13-2010 at 09:52 PM.
Reason: Adding truck information