Check the condition of the air filter

Move on to Step 1

Filter element dirty or damaged

Replace the filter element

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 2

Presence of faults.

Continue following the instructions given by the diagnostic equipment.

No communication with the control unit

Restore the connection between the engine management control unit and the diagnostic connector

 See E5030 PETROL ENGINES ELECTRONIC MANAGEMENT

Connect the diagnostic equipment (Examiner or other instruments) and carry out the active diagnosis for:

- vapour recovery solenoid

- injectors

Move on to Step 3

Connections faulty

Restore connection for injectors and solenoid with control unit

 See E5030 PETROL ENGINES ELECTRONIC MANAGEMENT

Solenoid faulty

Replace the solenoid

Injector faulty

Replace the injector

 Op. 1056B70 INJECTOR (ONE) - R + R WITH FUEL MANIFOLD PIPE REMOVED - INCLUDES SEAL REPLACEMNT

Check that the upstream Lambda sensor is working properly by performing

 See Test 1080BA Check on the operation of the upstream Lambda sensor

Move on to Step 4

Lambda sensor defective

Replace the upstream Lambda sensor

 Op. 1080B94 FRONT LAMBDA SENSOR TO WITH CATALYTIC CONVERTER - R.R

Check that the downstream Lambda sensor is working properly by performing

 See Test 1080BD Check on the operation of the downstream Lambda sensor

Move on to Step 5

Lambda sensor defective.

Replace downstream Lambda sensor

 Op. 1080B95 REAR LAMBDA SENSOR TO CATALYTIC CONVERTER - R.R

Check the condition of the air supply circuit

Move on to Step 6

Circuit component damaged

Replace the component involved.

Check the fuel supply pressure by performing

 Op. 0520G46 FUEL SYSTEM - CHECK SUPPLY PRESSURE USING THE EXAMINER

End of diagnosis

Pressure not correct.

Replace the fuel pump

 Op. 1040A70 SUBMERGED PUMP ASSEMBLY COMPLETE WITH LEVEL GAUGE CONTROL - R + R