Severity: Fix soon. Usually safe to drive for now.
The sensor that measures the temperature of the air entering the engine is reporting an extremely cold reading, which usually means the circuit is open.
Check the connector and wiring, then replace the sensor if the reading stays stuck at the cold extreme.
Usually just a check-engine light and slightly worse fuel economy.
Generally safe to drive, but get it checked soon. Usually just a check-engine light and slightly worse fuel economy.
The most common causes are: Failed intake air temperature sensor; Disconnected or damaged connector; Broken sensor wiring; Failed mass air flow sensor (on cars where the temperature sensor is built into it). A scan tool and a visual check of the parts above is where a technician starts.
Check the connector and wiring, then replace the sensor if the reading stays stuck at the cold extreme.
