134F02

134F02 - P101A

Information saved in
DME

Fault code
134F02 - P101A

Fault text
Valvetronic, adjustment range: stop not learned

Fault description
The diagnostic function determines whether a valid travel
limit is reached during initialization of the Valvetronic
system.

Condition for fault identification
Test condition:
In order to initialize the Valvetronic system, each time the
DME control module wakes up, and each time terminals are
changed on the DME, the upper travel stop is relearned. This
fault is logged when the system fails to recognize the travel
stop correctly.
Potential problem source(s):
- Valvetronic system travel stops damaged
- Stiction in the Valvetronic system
Terminal condition: Terminal 15
Voltage condition:
- Onboard electrical system voltage between 9 V and 16 V
Temperature condition:
- Engine warmed to normal temp, above 80 °C
Time condition:
- None
Other conditions:
- Initialization of Valvetronic systems

Condition for fault memory entry
none

Action in service
- Check travel stops in cylinder head and on the eccentric
shaft
- Inspect Valvetronic system to verify correct installation
and freedom of movement

Fault effect and breakdown warning
Breakdown notice:
Continued driving is usually not possible.
Possible apparent symptoms:
Once the VVT has reached its emergency running position,
unlimited throttled operation is possible.
If it fails to reach the emergency running position, results
ranging from a power loss to breakdown vehicle can occur
depending on the VVT position that the system does reach.

Driver information
Warning light:
MY10 ECE:
- ECE emissions warning lamp: off
- ECE electronic engine power reduction: on
- CC message: on
MY10 US:
- US emissions warning lamp: off
- US electronic engine power reduction: off
- CC message: none
MY10 ECE:
- ECE emissions warning lamp: off
- ECE electronic engine power reduction: off
- CC message: none

Service instruction
None