10AA51

10AA51 - P112B

Information saved in
DME

Fault code
10AA51 - P112B

Fault text
Coolant-temperature sensor, plausibility: engine temperature
in rel. to model implausibly too low

Fault description
The diagnostic function monitors the coolant temperature
sensor.

Condition for fault identification
Test condition:
The fault is recognized when the coolant temperature sensor
transmits implausible temperature data.
Potential problem source(s):
- Defect in wiring harness between DME and coolant
temperature sensor
- Coolant 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:
- 1 min. after engine start
Other conditions:
- Engine on
- No block heater active

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 coolant
temperature sensor
- Replace coolant temperature sensor
- Replace DME

Fault effect and breakdown warning
Breakdown notice:
None
Possible apparent symptoms:
Possible power reduction
Fan at maximum rotation speed

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