10BA42

10BA42 - P10C9

Information saved in
DME

Fault code
10BA42 - P10C9

Fault text
Intake-air temperature sensor, cold start: intake-air
temperature too high

Fault description
The diagnostic function monitors the intake-air temperature
to detect excessively high values during cold starts.

Condition for fault identification
Test condition:
The fault is recognized when the intake-air temperature
exceeds an average figure from several temperatures during
cold starts.
Potential problem source(s):
- Defective wiring harness between DME and intake-air
temperature sensor
- Intake-air temperature sensor defective
- Defective DME
Terminal condition: none
Voltage condition:
- Onboard electrical system voltage between 9 V and 16 V
Temperature condition:
- None
Time condition:
- 21 sec. after engine start
Other conditions:
- Cold engine start

Condition for fault memory entry
This fault is logged in the control module's fault memory
immediately.

Action in service
- Check wiring harness between DME and intake-air
temperature sensor
- Replace intake-air temperature sensor
- Replace DME

Fault effect and breakdown warning
Breakdown notice:
None
Possible apparent symptoms:
Rough engine, possibly followed by power reduction caused
by thermal management

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
None