JCB Fault Code
Free · no signupP205B-00
No SCR Dosing.
System
Not specified
Symptom
No SCR Dosing.
Diagnosis & fix steps
LOGIC: DEF Tank Temp sensor data is erratic.
ACTION: Check the resistance of the temperature sensor in the tank header. Replace the header if it reads "Open."
Red Seal field insights
The sensor is integrated into the suction tube (header). If it fails, the machine thinks the DEF is frozen and won't spray, even in summer.
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