my check engine is on on 2005 Honda Civic

i have a Honda civic lx 05 . I already change the thermostat and now it reads code P0128 and code P0128pd. what else can the codes mean. can it be the sensor messing up?

Asked by for the 2005 Honda Civic
1 answer
What do the ECT1 and ECT2 say at ambient temperature, the same or different?