939005154 - Y023 P0234 - TURBO PRESSURE

The diagnostic equipment signals: Error P0234 (Supercharging pressure).

This error is detected if the supercharging pressure is too high or too low. As a result, the exhaust gas recirculation valve is switched off and the supercharging pressure can longer be controlled.

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 condition of the fuel supply circuit and make sure that it is working properly carrying out the    See Test 1040OA FUEL SUPPLY 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	Ambient parameters check	ALL OK	PROBLEMS ENCOUNTERED	ACTION
	Select the following control unit at the diagnostic equipment: EDC16C39 Diesel electronic injection control unit.Check the value of the following parameters: Supercharging pressure Objective Supercharging pressure Measured Overboost valve closure     See Test 1060GF SUPERCHARGING PRESSURE CHECK	End of diagnosis