1C5A20

1C5A20 - P1521

Information saved in
DME

Fault code
1C5A20 - P1521

Fault text
BSD message from oil-condition sensor: no message

Fault description
The diagnostic function monitors the BSD message from the
oil level sensor (QLT).

Condition for fault identification
Test condition:
The fault is recognized when no BSD telegram from the oil
condition sensor (QLT) is received.
Potential problem source(s):
- Problem with BSD wire between DME and oil quality
sensor (QLT)
- Defective DME
Terminal condition: Terminal 15
Voltage condition:
- Onboard electrical system voltage between 9 V and 16 V
Temperature condition:
- None
Time condition:
- None
Other conditions:
- none

Condition for fault memory entry
The diagnostic fault code is logged when the fault remains
present for longer than 2 min.

Action in service
- Check wiring harness between DME and oil quality sensor
(QLT),
- replace oil quality sensor (QLT),
- replace DME

Fault effect and breakdown warning
Breakdown notice:
None
Possible apparent symptoms:
Adaptation (reduction) of engine oil service interval

Driver information
Warning light:
- ECE emissions warning lamp: off
- ECE electronic engine power reduction: off
- CC message: none
- US emissions warning lamp: off
- US electronic engine power reduction: off
- CC message: none

Service instruction
None