OBD2 Error Code, P1446 - Suggestions?

Hello folks,

Can you please give me some information on the following OBD2 code that my truck has:

It is a 2005 Crew Cab LE Titan 4X4

=== Stored Error Code(s) ===
Error Code: P1446
Possible Causes:

Freeze Frame Information:
1. DTC for which Freeze Frame was Stored - P1615.
2. Fuel System 1 Status - Open Loop.
3. Fuel System 2 Status - Open Loop.
4. Calculated LOAD Value - 0.00 %.
5. Engine Coolant Temp - 120.20 °F.
6. Short Term Fuel Trim - Bank 1 - 0.00 %.
7. Long Term Fuel Trim - Bank 1 - 0.00 %.
8. Short Term Fuel Trim - Bank 2 - 0.00 %.
9. Long Term Fuel Trim - Bank 2 - 0.00 %.
10. Engine RPM - 0.00 Rpm.
11. Vehicle Speed Sensor - 0.00 Mph.
12. Absolute Throttle Position - 0.00 %.

Monitor Information:

1. MIL - ON.
2. Misfire Monitoring - Complete.
3. Fuel System Monitoring - Complete.
4. Comprehensive Component Monitoring - Complete.
5. Catalyst Monitoring - Complete.
6. Heated Catalyst Monitoring - Not Supported.
7. Evaporative System Monitoring - Complete.
8. Secondary Air System Monitoring - Not Supported.
9. A/C System Refrigerant Monitoring - Not Supported.
10. Oxygen Sensor Monitoring - Complete.
11. Oxygen Sensor Heater Monitoring - Complete.
12. EGR System Monitoring - Not Supported.

Thank You
Rob C.