engine code assistance
 

Hello all...I got a couple codes showing...P1693 and P0128...I looked up 1693 and says "DTC Detected in ECM or PCM" what does this mean?? I looked up 0128 and says "ECT below Thermostat Regulating Temp"...does this one mean I need a new thermostat?? I have seen the coolant temp on gauge not moving as far as it used too...it stays cooler than before...any help in deciphering this would be great...Thank you in advance.

Sid:pca1:

P1693 is there because P0128 showed up.. I think it's called a companion code.

P0128 sounds like a thermostat to me, but definitely wait for others to speak up...

If the temp has been cooler than normal, I'd look at the t-stat. More than likely it's sticking open.