P15E8

1B9508 - P15E8

Information saved in
DME

Fault code
1B9508 - P15E8

Fault text
Engine switch-off time, plausibility: time too short in
correlation to engine-coolant cooling

Fault description
The diagnostic function monitors the engine's calculated
downtime by comparing it with the drop in coolant
temperature while the engine is stationary.

Condition for fault identification
Test condition:
The fault is recognized when the time required for engine
cooling is implausibly short relative to the calculated time.
Potential problem source(s):
- Instrument cluster disconnected from Terminal 30 during
stationary phase (battery change)
- Collateral fault stemming from a defective engine
temperature sensor
- Collateral fault from incorrect time signal from the
instrument cluster
Terminal condition: none
Voltage condition:
- Onboard electrical system voltage between 9 V and 16 V
Temperature condition:
- Engine temperature at engine shutdown > 80 °C
- Engine cooled by > 10 °C
Time condition:
- None
Other conditions:
- Engine ON

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

Action in service
- If Terminal 30 was disconnected, no further action
required
- Note any logged faults related to the coolant temperature
sensor
- Check whether the instrument cluster time is correct

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

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

Service instruction
None