199003084 - P0503 Vehicle speed incoherence

This error is detected if the junction unit does not receive the vehicle speed signal or the fuel consumption is too high compared with the power produced.

		Test results
1	ERROR DELETION	All OK	Problems encountered	Operation
	Turn the ignition key OFF and then ON.In the system: Bosch diesel injection control unit EDC16C39 CF4/EOBD CAN (EP engine 1.9), clear errors.	Move on to Step 2	-	-
2	ROAD TEST	All OK	Problems encountered	Operation
	Drive the vehicle in different driving conditions (engine speed and engine load) for a long stretch. Listen out for any unusual noises and other system irregularities.Read the fault codes and record them together with the status after the road test and check that the following error is no longer present:- P0503	End of diagnosis	The engine is not running smoothly	Proceed as instructed in the    See table D003 ENGINE NOT RUNNING SMOOTHLY / (IRREGULAR OPERATION)
			The engine is losing power	Proceed as instructed in the    See table D004 ENGINE NOT RUNNING SMOOTHLY
			The engine does not produce maximum performance	Proceed as instructed in the    See table D005 ENGINE DOES NOT PRODUCE BEST PERFORMANCE
			The engine response is poor	Proceed as instructed in the    See table D016 POOR ENGINE RESPONSE
			There is engine knock	Proceed as instructed in the    See table S003 ENGINE KNOCKING
			Error P0503 is present	Proceed as instructed in the    See Test 3340AB SPEED SIGNAL CHECK