939005168 - Y039 P0401 - EGR VALVE

The diagnostic equipment signals: Error P0401 (EGR valve).

This error is detected if the actual value of the exhaust gas recirculation flow is less than the nominal value of the exhaust gas recirculation flow.As a result, the exhaust gas recirculation valve is switched off and the supercharging pressure can longer be controlled and the quantity of fuel injected is reduced.

0	Preliminary checks	ALL OK	PROBLEMS ENCOUNTERED	ACTION
	Check that the engine oil level is correct    Op. 0010T11 ENGINE OIL - CHECK LEVEL AND TOP UP, IF NECESSARY Check that the air intake/vacuum circuit is working properly by carrying out the    See Test 1048OA AIR INTAKE/VACUUM CIRCUIT CHECKCheck the operation of the low pressure supply circuit by carrying out the    See Test 1060OB CHECK ON SUPPLY LOW PRESSURE FUEL CIRCUIT	Move on to Step 1	Oil level incorrect	Restore the correct engine oil level    Op. 0010T11 ENGINE OIL - CHECK LEVEL AND TOP UP, IF NECESSARY
1	EGR operation check	ALL OK	PROBLEMS ENCOUNTERED	ACTION
	Check that the EGR valve is working properly by carrying out the    See Test 1080CB E.G.R. SOLENOID FUNCTIONAL TEST	End of diagnosis