SAAB WIS ONLINE

ME9 / P0128 00

Read the instructions below then start the fault diagnostic procedure.

Symptom: Malfunction Indicator Lamp

  P0128 00


Engine Coolant Temperature below Thermostat Regulating Temperature

Fault symptom

Malfunction Indicator Lamp

On-board diagnosis

Type of diagnosis:

Once per driving cycle.

Enable criteria:

NONE of the following DTCs must be detected:
P0117, P0118

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:

Type III
(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:

Engine Temperature

(See also description of readings/activations in diagnostic tool)