Pinpoint Test C: The Engine Does Not Reach Normal Operating Temperature

WARNING: This page is about a different car, the 2013 Ford F-550 Super Duty, 2013 Ford F-450 Super Duty, 2013 Ford F-350 Super Duty, and 2013 Ford F-250 Super Duty. However, it is still accessible from the selected car via links, so may be relevant.

WARNING: Always allow the engine to cool before opening the cooling system. Do not unscrew the coolant pressure relief cap when the engine is operating or the cooling system is hot. The cooling system is under pressure; steam and hot liquid can come out forcefully when the cap is loosened slightly. Failure to follow these instructions may result in serious personal injury.

C1 CARRY OUT INSPECTION AND VERIFICATION
- Carry out the INSPECTION AND VERIFICATION procedure.
- Were any concerns found?
- Yes : REPAIR as needed. TEST the system for normal operation.
- No : GO to C2.
C2 CHECK FOR DTC P0125 or P0128
- Check for DTC P0125 or P0128.
- Is DTC P0125 or P0128 present?
- Yes : GO to C3.
- No : The cooling system is operational. If an inoperative engine coolant temperature gauge is suspected, CHECK the engine coolant temperature gauge operation. REFER to INSTRUMENTATION, MESSAGE CENTER, AND WARNING CHIMES . If an inoperative climate control system is suspected, CHECK the climate control system operation. REFER to CLIMATE CONTROL SYSTEM - GENERAL INFORMATION & DIAGNOSTICS . If any other PCM DTCs are retrieved, REFER to ELECTRONIC ENGINE CONTROLS - DIESEL ENGINES .
C3 CHECK THE COOLING FAN CLUTCH OPERATION
- Check the cooling fan clutch operation. Refer to the INTRODUCTION - DIESEL MODELS .
- Is the cooling fan clutch OK?
- Yes : GO to C4.
- No : INSTALL a new cooling fan clutch. TEST the system for normal operation.
C4 CHECK THE ENGINE COOLANT LEVEL
- NOTE: Allow the engine to cool before checking the engine coolant level.
  
  Visually check the engine coolant level in the degas bottle.
- Is the engine coolant level within specification?
- Yes : INSTALL a new thermostat. TEST the system for normal operation.
- No : To diagnose a coolant leak, GO to PINPOINT TEST A .