134F08

134F08 - P1023

Information saved in
DME

Fault code
134F08 - P1023

Fault text
Valvetronic, adjustment range: range check, deviation from
original learning

Fault description
The diagnostic function monitors the adjustment range
during the check of the Valvetronic's range.

Condition for fault identification
Test condition:
The fault is recognized when the adjustment range deviates
from the base adjustment range by more than 1�.
Potential problem source(s):
- Wear at the travel stops
- Wear in the Valvetronic mechanism
Terminal condition: none
Voltage condition:
- Onboard electrical system voltage between 9 V and 16 V
Temperature condition:
- Engine warmed to normal temp, above 80 °C
Time condition:
- Adjustment range check every 18000 min. of operating
time
Other conditions:
- Shutdown phase

Condition for fault memory entry
none

Action in service
- Repeat Valvetronic travel stop learning routine, refer to
service functions
- Inspect Valvetronic for mechanical wear and resistance to
motion
- Replace components with mechanical wear

Fault effect and breakdown warning
Breakdown notice:
None
Possible apparent symptoms:
None

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