P2458

4B93 - P2458

Information saved in
DDE

Fault code
4B93 - P2458

Fault text
DDE: Particulate-filter system: Regeneration incomplete

Fault description
Monitoring for incomplete regeneration. The diagnostic
trouble code is logged when the measured soot mass rises
above a limit value. The limit value is calculated based on
the simulatd soot mass and a characteristic curve.

Condition for fault identification
Test condition:
The test routine runs when the following conditions are
satisfied:
- Volumetric flow rate of exhaust gas is greater than
120 m^3/h.
- Particulate filter temperature is less than 450 �C.
- The particulate filter load accumulation is determined
based on measurement of differential pressure and not on
simulation.
- Regeneration has been successfully concluded and the
limit value has not yet been reached.
The error check runs with event debounce.
Voltage condition:
The test routine runs when the following conditions are
satisfied:
- Volumetric flow rate of exhaust gas is greater than
120 m^3/h.
- Particulate filter temperature is less than 450 �C.
- The particulate filter load accumulation is determined
based on measurement of differential pressure and not on
simulation.
- Regeneration has been successfully concluded and the
limit value has not yet been reached.
The error check runs with event debounce.

Condition for fault memory entry
Event debounced (1)

Action in service
Check particulate filter (aging, defect).

Fault effect and breakdown warning
Torque limitation, power reduction.

Driver information
Warning light:
MIL

Service instruction
none