Excessive Time To Enter Closed Loop Particulate Filter Regeneration Control
The DPF regeneration controller cannot transition into its closed-loop temperature control quickly enough - typically because EGT does not rise to setpoint within the calibrated window.
Affected components
- Dpf b1
- Exhaust gas temperature sensor b1
Common causes
- High likelihood: EGT rise too slow
Possible symptoms
- Check engine light or DPF warning light on
- Power loss / limp mode
- Increased fuel consumption
- Failed forced regeneration attempts
Diagnostic notes
- The malfunction indicator lamp may illuminate
- This code can affect emissions
Sources
Diagnostic information is provided for reference only. Confirm the code with a compatible scan tool and follow the vehicle manufacturer's service procedures before replacing components.