Error code: 1905

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An abnormally low temperature of the PRE HEATERS(64) on the HEATER RELAY BOARD ASSY.
An abnormally low temperature of the PRE HEATERS(64) is detected. Check whether the PRE HEATERS(64) are properly connected.
Check whether the THERMISTOR, PRE(s) is correctly installed. Check whether the THERMISTOR, PRE(s) is properly connected. Check whether the FUSE has blown. If so, replace the FUSE. Replace the HEATER RELAY BOARD ASSY.