4679 - P323F (DDE)

4679 - P323F

Information saved in
DDE

Fault code
4679 - P323F

Fault text
Fuel injection rate monitoring:

Fault description
Monitoring of calculated injection correction quantity.
The diagnostic trouble code is logged when the total
correction quantity minus the current value for the base
correction quantity falls below the limit value calculated
based on the current operating point (limit value roughly -25
mg, depends on injection quantity and actual air mass). The
monitoring function covers the injection quantities for all
cylinders and is determined using the lambda factor.

Condition for fault identification
Test condition:
The monitoring function is active when the injection
quantity monitoring is active.
Voltage condition:
The monitoring function is active when the injection
quantity monitoring is active.

Condition for fault memory entry
Debounce (5000 ms)

Action in service
1. Check mass airflow system and exhaust system for leaks
(also check before replacing parts) and repair leaks.
2. If diagnostic trouble codes related to the oxygen sensor
have been logged: Conduct fault diagnosis on the oxygen
sensor based on the diagnostic trouble codes logged in the
ECU.

Fault effect and breakdown warning
Proceed to the nearest BMW Service facility.

Driver information
Warning light:
MIL

Service instruction
Watch for leaks on exhaust-gas side behind exhaust-gas
discharge for the EGR system.