P0128

Stuck Thermostat.

P0128 - Stuck thermostat fault.: Last occurrence - plausibility

Possible causes:
1. Connectors C0606, C0331, C2348, C0169, C0422.
2. Harness integrity.
3. Thermostat stuck open.
4. Engine coolant temperature sensor.
5. Radiator outlet temperature sensor.

1. Connectors C0606, C0331, C2348, C0169, C0422.
CONNECTOR
Check for connector not correctly latched, backed out pins, damaged pins, corroded pins

2. Harness integrity.
CIRCUIT_INTEGRITY
Check for open circuit, short circuit to ground, supply or other circuit, damaged or unlatched connector, intermediate connectors or headers

3. Thermostat stuck open.
No detail available for this fault

4. Engine coolant temperature sensor.
No detail available for this fault

5. Radiator outlet temperature sensor.
No detail available for this fault