P2456 Differential pressure sensor tubing

1	COMPONENT CONCERNED	CHECK THE CONDITIONS OF THE CONNECTION PIPE FOR THE DPF SENSOR	OK (NO FAULTS DETECTED)	FAULT DETECTED	OPERATION
	DPF sensor connection pipe	Check the restriction of the connection pipe from sensor to DPF	Go to Step 2	Clogged pipe	Restore correct operation
2	COMPONENT CONCERNED	PIPE UPSTREAM OF PARTICULATE FILTER CHECK	OK (NO FAULTS DETECTED)	FAULT DETECTED	OPERATION
	Pipe upstream of particulate filter	Check whether the pipe upstream of the particulate filter is correctly connected	Go to Step 3	Pipe upstream of particulate filter not correctly connected	Restore the correct connection for the pipe
3	COMPONENT CONCERNED	PIPE UPSTREAM OF PARTICULATE FILTER CHECK	OK (NO FAULTS DETECTED)	FAULT DETECTED	OPERATION
	Pipe upstream of particulate filter	Check the condition of the pipe upstream of the particulate filter	Go to Step 4	Pipe not intact	Replace the damaged pipe
4	COMPONENT CONCERNED	ELECTRICAL CHECKS	OK (NO FAULTS DETECTED)	FAULT DETECTED	OPERATION
	Differential pressure sensor connections	Check the condition/presence of oxidation at the connections	Go to Step 5	Incorrect condition/presence of oxidation at the connections	Restore the connections to correct operation
5	COMPONENT CONCERNED	DIFFERENTIAL PRESSURE SENSOR WIRING CHECK	OK (NO FAULTS DETECTED)	FAULT DETECTED	OPERATION
	Differential pressure sensor wiring	Check the correct continuity of the differential pressure sensor wiring	Go to Step 6	Incorrect continuity	Restore the correct continuity
6	COMPONENT CONCERNED	DIFFERENTIAL PRESSURE SENSOR WIRING CHECK	OK (NO FAULTS DETECTED)	FAULT DETECTED	OPERATION
	Differential pressure sensor wiring	Check the correct insulation of the differential pressure sensor wiring	Go to Step 7	Incorrect insulation	Restore the correct insulation
7	COMPONENT CONCERNED	DIFFERENTIAL PRESSURE SENSOR OPERATION CHECK	OK (NO FAULTS DETECTED)	FAULT DETECTED	OPERATION
	Differential pressure sensor	Check correct operation of the differential pressure sensor	End of diagnosis	Differential pressure sensor incorrectly calibrated	Replace the differential pressure sensor See descriptions 1080B82