2002 Neon OBD code P1281

My wife's 2002 Neon showed a P1281 ode tonight. The code reader labeled it an "air fuel metering" problem. On line that code for a neon fefers to the engine not warmng up fast enough for the PCM. Nothing directly related to do with air fuel metering unlessthere is some default metering setting tha tthe PCM uses when this code pops. Any comments? Should I just replac ethe thermostat? Is there any tie in to the nass flow air sensor?

From speaking with friends who have had that code, it leads to a faulty thermostat. Cheap and easy fix.