P0299

4530 - P0299

Information saved in
DDE

Fault code
4530 - P0299

Fault text
Charging pressure control, high-pressure stage, control
deviation: Charging pressure too low/positive control
deviation: Charge-air pressure too low/positive control
deviation

Fault description
Boost-pressure control monitoring. A positive control
deviation (boost pressure too low) is recognized when the
boost-control deviation is greater than a limit defined based
on instantaneous operational status.
The upper limit for monitoring the boost-pressure control
deviation is derived from a program map, depends on engine
rpm and injection quantity, and lies at roughly 450 hPa.

Condition for fault identification
Test condition:
Monitoring for persistent control deviation is implemented
when the engine is in operating range 3 or 4.
- Operating range 3 is active when the injection quantity
exceeds 10 mg/hub and the engine speed is greater than
1400 1/min.
- Operating range 4 is active when the injection quantity
exceeds 100 mg/hub and the engine speed is greater than
6000 1/min.
Voltage condition:
Monitoring for persistent control deviation is implemented
when the engine is in operating range 3 or 4.
- Operating range 3 is active when the injection quantity
exceeds 10 mg/hub and the engine speed is greater than
1400 1/min.
- Operating range 4 is active when the injection quantity
exceeds 100 mg/hub and the engine speed is greater than
6000 1/min.

Condition for fault memory entry
Debounce (7000 ms)

Action in service
Engine with single-stage boost:
1. Check air-induction system for leaks.
2. Inspect exhaust system on engine side of turbine for leaks.
3. Check throttle valve.
4. Perform mass airflow system test.
Engine with multi-stage boost:
1. Check air-induction system for leaks.
2. Inspect exhaust system on engine side of turbines for
leaks. Note: An internal exhaust leak at the joint between the
large turbine and exhaust manifold is possible (at sealing
ring for turbine control flap).
3. Check throttle valve (DTCs logged in error memory).
4. Check turbine control flap.
5. Check boost pressure actuator's high-pressure stage.
6.Check turbocharger high-pressure stage for damage to
compressor and turbine blades.
7. Check wastegate valve.

Fault effect and breakdown warning
The error disables regeneration in the particulate filter.
Proceed to the nearest BMW Service facility.

Driver information
Warning light:
MIL

Service instruction
Check diagnostic trouble codes for the named components.
Note: On the F01 with N57D30T0 manufactured up to
February, 2010 the vacuum actuators for the turbine control
flap may display the following damage with the passage of
time:
- Leaking vacuum diaphragm.
- Linkage separates from the vacuum actuator.
In this case the vacuum actuator must be replaced.