Thermo King Alarm 809: Intake Air Pressure Sensor Error
Alarm 809 is listed as 'Intake Air Pressure Sensor Error' for Thermo King Truck/Trailer Refrigeration Unit. Verify the exact model and controller before acting.
Source checked 2026-05-01Error Codes
Browse published fault-code records by brand, product and displayed code.
Each record starts with the source meaning, then separates applicability, owner-safe actions, operating uncertainty and qualified-service boundaries. A matching code string alone is not enough: confirm the brand, product, model and controller before acting.
Thermo King Alarm 810: Atmospheric Pressure Sensor Error
Alarm 810 is listed as 'Atmospheric Pressure Sensor Error' for Thermo King Truck/Trailer Refrigeration Unit. Verify the exact model and controller before acting.
Source checked 2026-05-01Thermo King Alarm 811: Glow Plug Circuit Error
Alarm 811 is listed as 'Glow Plug Circuit Error' for Thermo King Truck/Trailer Refrigeration Unit. Verify the exact model and controller before acting.
Source checked 2026-05-01Thermo King Alarm 813: General Injector Error
Alarm 813 is listed as 'General Injector Error' for Thermo King Truck/Trailer Refrigeration Unit. Verify the exact model and controller before acting.
Source checked 2026-05-01Thermo King Alarm 815: Fuel Pressure Regulator Error
Alarm 815 is listed as 'Fuel Pressure Regulator Error' for Thermo King Truck/Trailer Refrigeration Unit. Verify the exact model and controller before acting.
Source checked 2026-05-01Thermo King Alarm 818: EGR Valve Actuator Error
Alarm 818 is listed as 'EGR Valve Actuator Error' for Thermo King Truck/Trailer Refrigeration Unit. Verify the exact model and controller before acting.
Source checked 2026-05-01Thermo King Alarm 819: ECU Power Relay Error
Alarm 819 is listed as 'ECU Power Relay Error' for Thermo King Truck/Trailer Refrigeration Unit. Verify the exact model and controller before acting.
Source checked 2026-05-01Thermo King Alarm 825: T1 Air Intake Temperature Sensor Error
Alarm 825 is listed as 'T1 Air Intake Temperature Sensor Error' for Thermo King Truck/Trailer Refrigeration Unit. Verify the exact model and controller before acting.
Source checked 2026-05-01Thermo King Alarm 826: T2 Air Intake Temperature Sensor Error
Alarm 826 is listed as 'T2 Air Intake Temperature Sensor Error' for Thermo King Truck/Trailer Refrigeration Unit. Verify the exact model and controller before acting.
Source checked 2026-05-01Thermo King Alarm 827: EGR Valve Position Sensor Error
Alarm 827 is listed as 'EGR Valve Position Sensor Error' for Thermo King Truck/Trailer Refrigeration Unit. Verify the exact model and controller before acting.
Source checked 2026-05-01Thermo King Alarm 828: Lambda System Error
Alarm 828 is listed as 'Lambda System Error' for Thermo King Truck/Trailer Refrigeration Unit. Verify the exact model and controller before acting.
Source checked 2026-05-01Thermo King Alarm 829: Main ECU Relay Error
Alarm 829 is listed as 'Main ECU Relay Error' for Thermo King Truck/Trailer Refrigeration Unit. Verify the exact model and controller before acting.
Source checked 2026-05-01Thermo King Alarm 830: Air Flow Meter Error
Alarm 830 is listed as 'Air Flow Meter Error' for Thermo King Truck/Trailer Refrigeration Unit. Verify the exact model and controller before acting.
Source checked 2026-05-01Thermo King Alarm 832: Engine Power Supply Error
Alarm 832 is listed as 'Engine Power Supply Error' for Thermo King Truck/Trailer Refrigeration Unit. Verify the exact model and controller before acting.
Source checked 2026-05-01Thermo King Alarm 833: High Pressure Pump Fuel Metering Unit Error
Alarm 833 is listed as 'High Pressure Pump Fuel Metering Unit Error' for Thermo King Truck/Trailer Refrigeration Unit. Verify the exact model and controller before acting.
Source checked 2026-05-01Thermo King Alarm 834: Water in Fuel Sensor Error
Alarm 834 is listed as 'Water in Fuel Sensor Error' for Thermo King Truck/Trailer Refrigeration Unit. Verify the exact model and controller before acting.
Source checked 2026-05-01Thermo King Alarm 836: Major ECU Failures
Alarm 836 is listed as 'Major ECU Failures' for Thermo King Truck/Trailer Refrigeration Unit. Verify the exact model and controller before acting.
Source checked 2026-05-01Thermo King Alarm 838: Intake Air System Error
Alarm 838 is listed as 'Intake Air System Error' for Thermo King Truck/Trailer Refrigeration Unit. Verify the exact model and controller before acting.
Source checked 2026-05-01Thermo King Alarm 839: Engine Speed Error
Alarm 839 is listed as 'Engine Speed Error' for Thermo King Truck/Trailer Refrigeration Unit. Verify the exact model and controller before acting.
Source checked 2026-05-01Thermo King Alarm 840: Fuel Injection Energizing Error
Alarm 840 is listed as 'Fuel Injection Energizing Error' for Thermo King Truck/Trailer Refrigeration Unit. Verify the exact model and controller before acting.
Source checked 2026-05-01Thermo King Alarm 841: High Pressure Pump Wear
Alarm 841 is listed as 'High Pressure Pump Wear' for Thermo King Truck/Trailer Refrigeration Unit. Verify the exact model and controller before acting.
Source checked 2026-05-01Thermo King Alarm 842: Engine Running in Safe Mode – Low Speed
Alarm 842 is listed as 'Engine Running in Safe Mode – Low Speed' for Thermo King Truck/Trailer Refrigeration Unit. Verify the exact model and controller before acting.
Source checked 2026-05-01Thermo King Alarm 843: Fuel Injection System Error
Alarm 843 is listed as 'Fuel Injection System Error' for Thermo King Truck/Trailer Refrigeration Unit. Verify the exact model and controller before acting.
Source checked 2026-05-01Thermo King Alarm 844: Engine Failed to Crank
Alarm 844 is listed as 'Engine Failed to Crank' for Thermo King Truck/Trailer Refrigeration Unit. Verify the exact model and controller before acting.
Source checked 2026-05-01