105A41 - P0129 (DME)

105A41 - P0129

Information saved in
DME

Fault code
105A41 - P0129

Fault text
Ambient-pressure sensor, plausibility: pressure too low

Fault description
The diagnostic function monitors the barometric-pressure
sensor.

Condition for fault identification
Test condition:
The fault is recognized when a short circuit is present.
Potential problem source(s):
- Defective wiring harness
- Cutoff relay for electric fan defective
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
This fault is logged in the control module's fault memory
immediately.

Action in service
- Check wiring harness between electric fan cutoff relay and
DME
- Check cutoff relay (when Terminal 15 is off then 0 V
should be present at both screw connections (M6). When
activated the relay should click loudly, while virtually no
resistance (0 ohms) should be measured between the screw
connections
- Replace cutoff relay

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

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

Service instruction
A terminal status switch must be conducted before this fault
can be deleted.