P0488 EGR valve position

			Test results
1	COMPONENT CONCERNED	CHECK EGR VALVE CLEANNESS	OK (NO FAULTS DETECTED)	FAULT DETECTED	OPERATION
	EGR valve	Check that the EGR valve is not fouled/dirty	Go to Step 2	EGR valve fouled/dirty	Clean the EGR valve
2	COMPONENT CONCERNED	CHECK WIRING BETWEEN HIGH PRESSURE EGR SOLENOID VALVE ACTUATOR AND ENGINE CONTROL MODULE	OK (NO FAULTS DETECTED)	FAULT DETECTED	OPERATION
	Wiring between high pressure EGR valve actuator and powertrain control module	Check the continuity of the wiring between high pressure EGR valve actuator and PIN 50 of the powertrain control module	Go to Step 3	Breaks in the wiring continuity	Restore the correct continuity of the wiring
3	COMPONENT CONCERNED	E.G.R. VALVE OPERATING CHECK	OK (NO FAULTS DETECTED)	FAULT DETECTED	OPERATION
	High pressure EGR valve	Connect the diagnostic tool to the powertrain control module, go to the “ACTUATORS” menu and launch procedure “EGR DC Motor test”. Check the outcome of the test	Go to Step 4	The test did NOT have a positive outcome	Replace the high pressure EGR valve Op. 1080C24 E.G.R. SYSTEM SOLENOID - R + R
4	COMPONENT CONCERNED	CHECK USING DIAGNOSIS EQUIPMENT	OK (NO FAULTS DETECTED)	FAULT DETECTED	OPERATION
	High pressure EGR valve	Check for other error codes stored in the powertrain control module	End of diagnosis	Additional errors stored in the Powertrain Control Module	Follow the instructions provided by the diagnostic tool to resolve the errors