P0271 Cylinder 4 injector

			Test results
1	COMPONENT CONCERNED	CONNECTIONS CHECK	OK (NO FAULTS DETECTED)	FAULT DETECTED	OPERATION
	Injector 4 connections	Check that the connections are not faulty	Go to Step 2	Faulty connections	Restore the correct connections
2	COMPONENT CONCERNED	WIRING CHECK	OK (NO FAULTS DETECTED)	FAULT DETECTED	OPERATION
	Injector 4 wiring	Check the continuity of the wiring between the injector and engine management control unit	Go to Step 3	Faults in the continuity of the wiring	Restore the correct continuity for the wiring
3	COMPONENT CONCERNED	WIRING CHECK	OK (NO FAULTS DETECTED)	FAULT DETECTED	OPERATION
	Injector 4 wiring	Check the correct insulation of the wiring between injector and engine management control unit	Go to Step 4	Wiring insulation not correct	Restore the correct insulation for the wiring
4	COMPONENT CONCERNED	INJECTOR OPERATION CHECK	OK (NO FAULTS DETECTED)	FAULT DETECTED	OPERATION
	Injector	check that the injector is working correctly	Go to Step 5	Injector not working properly	Replace the injector Op. 1060F11 INJECTOR ONE R R
5	COMPONENT CONCERNED	ENGINE MANAGEMENT CONTROL UNIT OPERATION CHECK	OK (NO FAULTS DETECTED)	FAULT DETECTED	OPERATION
	Engine management control unit	Check that the engine management control unit is working correctly	End of diagnosis	Engine management control unit not working properly	Replace the engine management control unit Op. 1060G80