ME9 / P0128 00
Read the instructions below then
start the fault diagnostic procedure.
Symptom: Malfunction Indicator Lamp
Engine Coolant Temperature below Thermostat Regulating Temperature
Fault symptom
Malfunction Indicator Lamp
On-board diagnosis
Type of diagnosis:
Enable criteria:
| NONE of the following DTCs must be detected: |
| Engine speed over 960 rpm. |
| Vehicle speed over 15 km/h |
| No block heater start detected. |
| Start temperature between -15°C and +50°C. |
| Total intake air mass exceeds 3000 grams. |
Fault criteria:
| Coolant temperature more than 5°C lower than calculated temperature during engine warm-up phase. |
OK report:
| Fault criteria NOT fulfilled. |
Fault handling:
| (See section Fault handling III, "Other emission-related components and functions" for more information.) |
Diagnostic help
Diagnosis regards:
| Fault in the cooling system (coolant level/thermostat). |
Functions in the diagnostic tool related to the fault:
| (See also description of readings/activations in diagnostic tool) |
