P0125 Insufficient Coolant Temperature for Closed Loop Fuel Control

What does this mean. I have a 1998 GMC pickup.

Steve Says,

Thanks for asking me your code question. This code basically is saying that your computer is getting a reading from your coolant temperature sensor (CTS) that is too low.

The most likely cause of this problem is a bad CTS censor, but it could be a problem with the wiring from the computer to the sensor or it could be a problem with the computer itself, but that is not as likely.

The easiest way to diagnose this problem is to hook a scan tool up to your vehicle and read what the computer says the coolant temperature is, then use a thermometer to see what the actual temperature is at the thermostat housing. If they are different then the sensor needs to be tested to see if it is faulty.

I hope this has helped.