P0299

P0299

Diagnosis information - DME control unit

Boost pressure control deviation

NOTE:
The boost pressure is judged to be too small and increased through the boost-pressure control.
The fault is detected if the boost pressure control cannot adjust the boost pressure correctly within a control limit.

Diagnostic conditions
- Ambient pressure > 700 mbar (hPa) (below approx. 3,000 m above sea level)
- Full-throttle acceleration

Possible fault causes
- Charge-air cooler or charge-air line(s) (pressure-side) leaks between turbocharger and engine
- Charge air cooler or Charge airline(s) (pressure-side) between Turbocharger and Engine Narrowed / Blocked
- Diverter valve does not close (sufficiently)
- Wrong value from boost pressure sensor on DME control unit
- Boost pressure adjuster fails to adjust (sufficiently)
- 1 Turbocharger blocked / Faulty

Fault effects
- Boost pressure control switched off (Boost pressure low)
- Reduction Engine torque