16683 - P0299 - 412B - Insufficient pressure in the turbo.
09572 - P2564 - Position sensor for boost pressure controller. Signal too weak.
09571 - P2563 - Position sensor for boost pressure positioner. Implausible signal.
Fault codes recorded in the engine control unit.
The vehicle displays one or several of the above - mentioned fault codes.
Lack of engine power.
Engine warning light (MIL) may be ON.
NOTE: This informative bulletin affects only those vehicles that are within a specific manufacturing date.
- Defect in the vacuum hoses.
- Defect in the turbocharger.
- Missing or broken stud with clamp nut on turbocharger.
- Defect in the turbocharger vacuum unit.
- Defective software of the unit.
- Read the fault codes recorded in the engine control unit using the diagnostic tool.
- Confirm that one or several of the fault codes that appear in the field symptoms of this bulletin are displayed.
- Check for possible leaks in the turbocharger vacuum system.
- Check if the vacuum hose is twisted, broken or not connected to the vacuum unit.
- Replace the vacuum hoses with new ones if there are leaks or the hoses are in poor condition.
- Replace the turbocharger with a new one if the stud with clamp nut is broken or missing.
- Check that the vacuum in the unit is maintained using a vacuum pump which generates 600 mbar vacuum.
- Replace the turbocharger with a new one if the vacuum is not mantained.
- Clear the fault codes recorded in the control unit using the diagnostic tool.
- After performing the above steps and confirming that the failure is still present the defect may be detected in the engine control unit.
- Reprogramme the engine control unit with updated software.
See image 1:
A - Turbocharger vacuum unit.