516726 31
What This Code Means
Cold cylinder detected for Cylinder head temperature 1; Cold cylinder detected for Cylinder head temperature 2; Cold cylinder detected for Cylinder head temperature 3; Cold cylinder detected for Cylinder head temperature 4; Cold cylinder detected for Cylinder head temperature 5; Cold cylinder detected for Cylinder head temperature 6; Cold cylinder detected for Cylinder head temperature 7; Cold cylinder detected for Cylinder head temperature 8; Cold cylinder detected for Cylinder head temperature 9; Cold cylinder detected for Cylinder head temperature 10; Cold cylinder detected for Cylinder head temperature 11; Cold cylinder detected for Cylinder head temperature 12; Cold cylinder detected for Cylinder head temperature 13; Cold cylinder detected for Cylinder head temperature 14; Cold cylinder detected for Cylinder head temperature 15; Cold cylinder detected for Cylinder head temperature 16; Cold cylinder detected for Cylinder head temperature 17; Cold cylinder detected for Cylinder head
Possible Causes
- •Cylinder head temperature sensor malfunction
- •Short circuit to battery in the speed adjustment (current) circuit
- •Short circuit to ground or open circuit in the speed adjustment (current) circuit
- •Speed adjustment (current) supply voltage out of range
- •Short circuit to battery in the SCR system (pump heater or common rail heater) circuit
- •Short circuit to ground in the SCR system (pump heater or common rail heater) circuit
- •Low rationality in the SCR system (pump inlet vacuum sensor)
- •Short circuit to battery in the SCR system (pump inlet vacuum sensor) circuit
- •Short circuit to ground in the SCR system (pump inlet vacuum sensor) circuit
- •Short circuit to battery in the SCR system (filter heater) circuit
- •Short circuit to ground in the SCR system (filter heater) circuit
- •Short circuit to battery in the SCR system (BLDC port) circuit
- •Plausibility error in the Exhaust gas temperature sensor (upstream SCR)
Suggested Actions
- 1Check cylinder head temperature sensors
Related Rehlko Fault Codes
ASK RUDY ABOUT THIS FAULT
Get a diagnosis walkthrough for 516726 31 on your specific Rehlko unit — cited to the OEM manual, not a forum guess.
TRY IT FREE