312000196 - W002 CO EMISSIONS LOW, NOX EMISSIONS HIGH

The CO percentage measured is very low, whilst the NOX percentage is higher than recommended.
1CHECK USING DIAGNOSTIC EQUIPMENTAll OKProblems encounteredOperation
Connect the diagnostic equipment (Examiner or other instruments) to the diagnostic socket.Check that there are no faults in the engine management control unit.Move on to Step 2Presence of faultsContinue following the instructions given by the diagnostic equipment.
No communication with the control unitRestore the connection between the engine management control unit and the diagnostic connector    See E5030 PETROL ENGINES ELECTRONIC MANAGEMENT
2All OKProblems encounteredOperation
Connect the diagnostic equipment (Examiner or other instruments) and carry out active diagnosis of the injectorsMove on to Step 3Connections faultyRestore the connection between the injectors and the control unit    See E5030 PETROL ENGINES ELECTRONIC MANAGEMENT
Injector faultReplace the injector    Op. 1056B70 INJECTOR (ONE) - R + R WITH FUEL MANIFOLD PIPE REMOVED - INCLUDES SEAL REPLACEMNT
3UPSTREAM LAMBDA SENSOR CHECKAll OKProblems encounteredOperation
Check that the upstream Lambda sensor is working properly by performing    See Test 1080BA UPSTREAM LAMBDA SENSOR OPERATION CHECKMove on to Step 4Lambda sensor defective.Replace the Lambda sensor    Op. 1080B94 FRONT LAMBDA SENSOR TO WITH CATALYTIC CONVERTER - R.R
4DOWNSTREAM LAMBDA SENSOR CHECKAll OKProblems encounteredOperation
Check that the downstream Lambda sensor is working properly by performing    See Test 1080BD DOWNSTREAM LAMBDA SENSOR OPERATION CHECKMove on to Step 5Lambda sensor defective.Replace the Lambda sensor    Op. 1080B95 REAR LAMBDA SENSOR TO CATALYTIC CONVERTER - R.R
5AIR CIRCUIT CHECKAll OKProblems encounteredOperation
Check the condition of the air supply circuit.Move on to Step 6Circuit component damaged.Move on to Step 6 for the 1.4 16v version onlyMove on to Step 7 for the 1.2 8v version
6BLOW-BY CIRCUIT CHECKAll OKProblems encounteredOperation
Check the condition of the blow-by gas intake circuit: in particular, check for obstructions in the separator or pipes.Move on to Step 7Circuit faulty.Restore circuit to working order
Fault in the separator.Replace the separator.
7FUEL PRESSURE CHECKAll OKProblems encounteredOperation
Check the fuel supply pressure by performing    Op. 0520G46 FUEL SYSTEM - CHECK SUPPLY PRESSURE USING THE EXAMINEREnd of diagnosisPressure not correct.Replace the fuel pump    Op. 1040A70 SUBMERGED PUMP ASSEMBLY COMPLETE WITH LEVEL GAUGE CONTROL - R + R