DTC P0128: Thermostat [08/2016 - ]: Procedure
WARNING: This page is about a different variant/trim than selected.
- CHECK ANY OTHER DTCS OUTPUT (IN ADDITION TO DTC P0128)
- Connect the Techstream to the DLC3.
- Turn the ignition switch to ON.
- Turn the Techstream on.
- Enter the following menus: Powertrain / Engine and ECT / Trouble Codes.
- Read the DTCs.
Powertrain > Engine and ECT > Trouble Codes
Result
Result Proceed to DTC P0128 is output A DTC P0128 and other DTCs are output B HINT:
If any DTCs other than P0128 are output, troubleshoot those DTCs first.
Result: 2
B
GO TO DTC CHART: DIAGNOSTIC TROUBLE CODE CHART [08/2016 - ]
Result: 1
A
See step 2
- CHECK COOLING SYSTEM
- Check for defects in the cooling system that might cause the system to be too cold, such as abnormal cooling fan operation or any modifications.
Result
Proceed to OK NG
Result: 2
NG
REPAIR OR REPLACE COOLING SYSTEM
Result: 1
OK
See step 3
- Check for defects in the cooling system that might cause the system to be too cold, such as abnormal cooling fan operation or any modifications.
- INSPECT THERMOSTAT
- Inspect the thermostat (thermostat opening temperature).
Refer to INSPECTION [08/2013 - ]
Result
Proceed to OK NG
Result: 2
NG
REPLACE THERMOSTAT. Refer to REMOVAL [08/2013 - ]
Result: 1
OK
See step 4
- Inspect the thermostat (thermostat opening temperature).
- INSPECT ENGINE COOLANT TEMPERATURE SENSOR
- Inspect the engine coolant temperature sensor.
Refer to INSPECTION [08/2013 - ]
HINT:
Perform "Inspection After Repair" after replacing the engine coolant temperature sensor.
Refer to INITIALIZATION [08/2016 - ]
Result
Proceed to OK NG
Result: 1
OK
REPLACE ECM. Refer to REMOVAL [08/2016 - ]
Result: 2
NG
REPLACE ENGINE COOLANT TEMPERATURE SENSOR. Refer to REMOVAL [08/2013 - ]
- Inspect the engine coolant temperature sensor.