Workshop Manuals Factory service & repair Alfa Romeo
Alfa Romeo Brera and Spider Factory Service Manual (2005-2010)23 · Fault diagnosis
23 · Diagnostics

P0234 - turbo pressure

Make
Alfa Romeo
Model
Brera and Spider Factory Service Manual
Year
2005–2010
Section
Examiner - diesel electronic management › P0234 - turbo pressure
Fault diagnosisP0234 - turbo pressure

P0234 - TURBO PRESSURE

2.4 JTD 20v

The diagnostic equipment signals: Error P0234 (Supercharging pressure).

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.

0Preliminary checksALL OKPROBLEMS ENCOUNTEREDACTION

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 CHECK

Check the condition of the fuel supply circuit and make sure that it is working properly carrying out the

See Test 1040OA FUEL SUPPLY CIRCUIT CHECK

Check the operation of the low pressure supply circuit by carrying out the

See Test 1060OB CHECK ON SUPPLY LOW PRESSURE FUEL CIRCUIT

Move on to Step 1Oil level incorrect

Restore the correct engine oil level

Op. 0010T11 ENGINE OIL - CHECK LEVEL AND TOP UP, IF NECESSARY

1Ambient parameters checkALL OKPROBLEMS ENCOUNTEREDACTION

Select the following control unit at the diagnostic equipment: EDC16C39 Diesel electronic injection control unit.

Check the value of the following parameters:

  • Supercharging pressure Objective
  • Supercharging pressure Measured
  • Overboost valve closure

See Test 1060GF

End of diagnosis

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