Disclaimer:
This post is based on my personal experience and intended for informational and educational purposes only. Procedures, tools, and parts may vary depending on the vehicle and situation. Always consult your service manual or a professional before performing any maintenance.For more information, please read the full disclaimer here.
BMW 216d Gran Coupe in the City
The BMW 2 Series Gran Coupe (chassis code F44) is BMW’s entry-level four-door coupe. The F44 combines sporty styling with practicality, offering a more compact alternative to the 4 Series Gran Coupe.
The car examined in this report from 2020, showing 67,239 km on the odometer. It is equipped with a 1.5-liter three-cylinder diesel engine, designed for efficiency in both city and highway driving. The vehicle had a check engine warning active, so we connected it to a diagnostic tool.
In this article, we present the fault codes and data that were retrieved during the diagnostic session.
Diagnostic Tools
All information presented here was retrieved using Launch diagnostics and the BimmerLink application. In this article, we present the fault codes and data that were collected during the diagnostic session.
Check Engine Light and Errors Found
The car had an active check engine light, with the following error codes recorded during diagnostics:
DME/DDE (Digital Diesel Electronics / ECM)
- 2D5600: Oxygen Sensor After Catalytic Converter, Signal: Open Circuit
KAFAS (Camera-Based Driver Assistance Systems)
- 800ABF: KAFAS Camera – Field Of Vision Impaired For A Short Time
BDC (Body Domain Controller)
- 804081: Driver Readiness, Error – Production Not Possible
These errors indicate issues with emissions monitoring (oxygen sensor), temporary driver assistance camera vision problems, and a readiness-related error in the body domain controller.
Diagnostic Data from DME/DDE
To better understand the car’s diesel particulate filter (DPF) health and engine condition, we extracted additional data from the control unit.
DPF Regeneration Statistics
| Parameter | Value |
|---|---|
| Average Driving Distance Between Active Regenerations | 237 km |
| Average Regeneration Interval | 444 km |
| Average Soot Mass at Start of Regeneration | 7.05 g |
| Average Soot Mass at End of Regeneration | 0.51 g |
| Average Temperature Before DPF During Regeneration | 548.30 °C |
| Average Temperature Before DPF in All Loading Cycles | 223.90 °C |
| Average Temperature Before Oxidation Catalyst During Regeneration | 332 °C |
These values represent the DPF’s self-cleaning cycles. The soot mass and temperature readings show how effectively the DPF burns off accumulated soot during regeneration. Frequent regenerations (every ~444 km) suggest the filter is working as intended.
Oil Condition Parameters
| Parameter | Value |
|---|---|
| Oil Ash Mass | 11.46 g |
| Oil Dilution Level | 7.70 % |
- Oil Ash Mass reflects non-combustible residues left in the engine oil due to combustion and DPF regeneration.
- Oil Dilution Level indicates the percentage of fuel mixed into the oil during post-injection phases for DPF regeneration. A 7.70% level means the oil should be monitored closely and changed soon to maintain engine health.
Highway Driving for Regeneration
To initiate a successful DPF regeneration, the car was driven on the highway under optimal conditions (after clearing error codes).
Pre-Regeneration Data (Before Highway Drive)
Here are the values recorded before taking the car on the highway:
| Parameter | Value |
|---|---|
| Differential Pressure Across DPF | 0.0008 bar |
| Soot Mass in DPF | 29.40 g |
| Distance Driven Since Last Successful Regeneration | 136 km |
| Fuel Consumption Since Last Regeneration | 7.87 l |
| Operation Time Since Last Successful Regeneration | 03:33:32 |
| Remaining DPF Lifetime | 244,940 km |
Before the highway drive, the check engine fault (2D5600: Oxygen Sensor After Catalytic Converter, Signal: Open Circuit) was cleared. The car was then driven on the highway to initiate regeneration. Unfortunately, after restarting the engine, the fault code reappeared.
The vehicle will be inspected at an authorized BMW service centre for further diagnostics.
Post-Regeneration Data (After Highway Drive)
After the regeneration was completed, the following updated values were recorded:
| Parameter | Value |
|---|---|
| Differential Pressure Across DPF | 0.003 bar |
| Soot Mass in DPF | 6.18 g |
| Distance Driven Since Last Successful Regeneration | 54 km |
| Fuel Consumption Since Last Regeneration | 2.86 l |
Conclusion
We’ll keep an eye on this case and share an update once the vehicle has been inspected at the authorized BMW service centre. As soon as the exact cause is identified and fixed, we’ll update this report with the final findings to provide a clear picture of the issue and its solution.
