Chrysler
Type:
    Powertrain - Fuel and Air Metering - ISO/SAE Controlled
Description:
    Closed Loop Temp. Not Reached Conditions
Cause:
    No ECT codes set, engine runtime over 10 minutes, then the test started and the PCM detected the ECT input did not exceed at least 140°F after 10 minutes of operation

Ford
Type:
    Powertrain - Fuel and Air Metering - ISO/SAE Controlled
Description:
    Insufficient Coolant Temperature for Closed Loop Conditions
Cause:
    Engine running at road load or cruise speed for 6 minutes, then the PCM detected the engine did not enter closed loop mode after one minute

Generic
Type:
    Powertrain - Fuel and Air Metering - ISO/SAE Controlled
Description:
    Insufficient Coolant Temperature for Closed Loop Fuel Control

GM
Type:
    Powertrain - Fuel and Air Metering - ISO/SAE Controlled
Description:
    ECT Excessive Time To Enter Closed Loop Conditions
Cause:
    DTC P0112, P0113, P0117 and P0118 not set, engine running, IAT input less than 32°F, VSS input at least 1 mph, then the PCM detected that 4.5 minutes had passed since the conditions were met and the ECT input was less than 41°F for 3 seconds.

Nissan
Type:
    Powertrain - Fuel and Air Metering - ISO/SAE Controlled
Description:
    Engine coolant temperature - too low for closed loop control
Cause:
    Wiring, ECT sensor, cooling system, ECM