P0402 Air quantity control

			Test results
1	COMPONENT CONCERNED	INTAKE DUCT CHECK	OK (NO FAULTS DETECTED)	FAULT DETECTED	OPERATION
	Intake duct	Check the condition/obstruction of the intake ducts	Go to Step 2	Faulty intake ducts	Restore the intake duct to correct operation
2	COMPONENT CONCERNED	FLOW METER OPERATION CHECK	OK (NO FAULTS DETECTED)	FAULT DETECTED	OPERATION
	Airflow meter	Check that the flow meter is working correctly by carrying out See Test 1060GS CHECK ON FLOW METER OPERATION	End of diagnosis	Airflow meter not working properly	Replace the airflow meter Op. 1060G10 AIR FLOW METER - R.R.
3	COMPONENT CONCERNED	CHECK USING DIAGNOSIS EQUIPMENT	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