199003070 - P0234 Supercharging pressure signal

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.

		Test results
0	PRELIMINARY CHECKS	All OK	Problems encountered	Operation
	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 LOW FUEL DELIVERY PRESSURE CIRCUIT CHECK	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	Operation
	Select the following control unit at the diagnostic equipment: Diesel injection Bosch EDC16C39 CF4/EOBD CAN (EP 1.9).Check the value of the following parameters:- Supercharging pressure Objective- Supercharging pressure MeasuredOverboost valve closure    See Test 1060GF SUPERCHARGING PRESSURE CHECK	End of diagnosis	-	-