3022755 - W02 CO EMISSIONS LOW, NOx EMISSIONS HIGH

The CO percentage measured is very low, with a corresponding NOx percentage higher than the recommended figure.

		Results of the tests
1	CHECKING WITH DIAGNOSTIC EQUIPMENT	All OK	Problems met	Operation
	Connect diagnostic equipment (Examiner or other instruments) to the diagnostic socket.Check that there are no faults in the engine management control unit	Continue to Step 2	'Fuel system' error appears	See table   Z50  MIXTURE STRENGTH ERROR
			'Misfiring' error appears	See table   Z53  MISFIRE ERROR
			'Catalytic converter' error detected	See table   Z55  CATALYZER ERROR
			'Upstream lambda sensor' error detected	See table   Z56  UPSTREAM LAMBDA SENSOR SIGNAL ERROR
			'Downstream lambda sensor' error detected	See table   Z58  DOWNSTREAM LAMBDA SENSOR SIGNAL ERROR
			Another error dected in the control unit	Continue following the instructions for the diagnostic equipment
			Lack of dialogue with the control unit	Restore the connection between the engine management control unit and the diagnostic connector See   E5030  PETROL ENGINE ELECTRONIC MANAGEMENT
2	ACTIVE DIAGNOSIS WITH DIAGNOSTIC EQUIPMENT	All OK	Problems met	Operation
	Using the diagnostic equipment (Examiner or other instruments) carry out the active diagnosis of the injectors	Continue to Step 3	Connections faulty	Restore the connection of the injectors and the solenoid with the control unit See   E5030  PETROL ENGINE ELECTRONIC MANAGEMENT
			Faulty injector	Replace injector Op.   1056B70
3	UPSTREAM LAMBDA SENSOR CHECK	All OK	Problems met	Operation
	Check that the upstream Lambda sensor is working properly See Test   1080BA  CHECK ON UPSTREAM LAMBDA SENSOR OPERATION'	Continue to Step 4	Lambda sensor defective	Replace the Lambda sensor Op.   1080B94
4	DOWNSTREAM LAMBDA SENSOR CHECK	All OK	Problems met	Operation
	Check that the downstream Lambda sensor is working properly See Test   1080BD  CHECK ON DOWNSTREAM LAMBDA SENSOR OPERATION'	Continue to Step 5	Lambda sensor defective	Replace the Lambda sensor Op.   1080B95
5	CHECKING AIR CIRCUIT	All OK	Problems met	Operation
	Check the condition of the air supply circuit	Continue to Step 6	Circuit component damaged	Replace the component involved
6	CHECKING BLOW-BY CIRCUIT	All OK	Problems met	Operation
	Check the condition of the blow-by gas intake circuit, in particular, check that there are no obstructions in the separator or the pipes	Continue to Step 7	Circuit faulty	Restore the operation of the system
			Fault in the separator	Replace the separator
7	CHECKING FUEL PRESSURE	All OK	Problems met	Operation
	Check the fuel supply pressure Op.   0510C10	Continue to Step 8	Pressure not correct	Replace the fuel pump
8	CHECKING CORRECT OPERATION	All OK	Problems met	Operation
	Check that the fault is no longer present		Fault persists	Search for the fault starting from another symptom'

The CO percentage measured is very low, with a corresponding NOx percentage higher than the recommended figure.

		Results of the tests
1	CHECKING WITH DIAGNOSTIC EQUIPMENT	All OK	Problems met	Operation
	Connect diagnostic equipment (Examiner or other instruments) to the diagnostic socket.Check that there are no faults in the engine management control unit	Continue to Step 2	'Fuel system' error appears	See table   Z50  MIXTURE STRENGTH ERROR
			'Misfiring' error appears	See table   Z53  MISFIRE ERROR
			'Catalytic converter' error detected	See table   Z55  CATALYZER ERROR
			'Upstream lambda sensor' error detected	See table   Z56  UPSTREAM LAMBDA SENSOR SIGNAL ERROR
			'Downstream lambda sensor' error detected	See table   Z58  DOWNSTREAM LAMBDA SENSOR SIGNAL ERROR
			Another error detected in the control unit	Continue following the instructions for the diagnostic equipment
			Lack of dialogue with the control unit	Restore the connection between the engine management control unit and the diagnostic connector See   E5030  PETROL ENGINE ELECTRONIC MANAGEMENT
2	ACTIVE DIAGNOSIS WITH DIAGNOSTIC EQUIPMENT	All OK	Problems met	Operation
	Using the diagnostic equipment (Examiner or other instruments) carry out the active diagnosis of the injectors	Continue to Step 3	Connections faulty	Restore the connection of the injectors and the solenoid with the control unit See   E5030  PETROL ENGINE ELECTRONIC MANAGEMENT
			Faulty injector	Replace injector Op.   1056B70
3	UPSTREAM LAMBDA SENSOR CHECK	All OK	Problems met	Operation
	Check that the upstream Lambda sensor is working properly See Test   1080BA  CHECK ON UPSTREAM LAMBDA SENSOR OPERATION'	Continue to Step 4	Left Lambda sensor faulty	Replace the left Lambda sensor Op.   1080B93
			Right Lambda sensor faulty	Replace the right Lambda sensor Op.   1080B92
4	DOWNSTREAM LAMBDA SENSOR CHECK	All OK	Problems met	Operation
	Check that the downstream Lambda sensor is working properly See Test   1080BD  CHECK ON DOWNSTREAM LAMBDA SENSOR OPERATION'	Continue to Step 5	Lambda sensor defective	Replace the Lambda sensor Op. 1080B90
5	CHECKING AIR CIRCUIT	All OK	Problems met	Operation
	Check the condition of the air supply circuit	Continue to Step 6	Circuit component damaged	Replace the component involved
6	CHECKING BLOW-BY CIRCUIT	All OK	Problems met	Operation
	Check the condition of the blow-by gas intake circuit, in particular, check that there are no obstructions in the separator or the pipes	Continue to Step 7	Circuit faulty	Restore the operation of the system
			Fault in the separator	Replace the separator
7	CHECKING FUEL PRESSURE	All OK	Problems met	Operation
	Check the fuel supply pressure Op.   0510C10	Continue to Step 8	Pressure not correct	Replace the fuel pump
8	CHECKING CORRECT OPERATION	All OK	Problems met	Operation
	Check that the fault is no longer present		Fault persists	Search for the fault starting from another symptom'