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Home >> Chrysler >> 2011 >> 300 C, RWD >> Repair and Diagnosis >> External Pages >> Different car >> Section 97 (6.7L Diesel - DTCS - P0008 To P040C - 3500 Cab & Chassis) >> Diagnosis and Testing >> P0116-Engine Coolant Temperature Sensor Performance >> Testing >> Diagnostic Test

Diagnostic Test

WARNING: This page is about a different car, the 2011 RAM Cab & Chassis. However, it is still accessible from the selected car via links, so may be relevant.
  1. CHECK THE COOLANT LEVEL 
    1. Turn the ignition off.
    2. With the engine cold, verify the level of coolant in the cooling system.

      Is the cooling system full of coolant?

      Yes 

      • Go To  2.

      No 

  2. THERMOSTAT 
    1. With the scan tool, check DTCs.
      NOTE:

      If DTC P0117 or P0118 are present, repair those DTCs before proceeding with this test.

      Is DTC P0128-Thermostat Rationality present?

      Yes 

      No 

      • Go To  3.
  3. COOLANT TEMPERATURE SENSOR 
    1. Remove the Coolant Temperature Sensor and reconnect the wiring to the sensor.
    2. Turn the ignition on.
    3. Monitor scan tool while heating the sensor with an external heat source (DO NOT USE OPEN FLAME).

      Does the reading from the Coolant Temperature Sensor increase at least 5°F on the scan tool?

      Yes 

      • Go To  4.

      No 

  4. COOLANT TEMPERATURE SENSOR 
    1. Let vehicle cold soak for eight hours.
    2. Turn the ignition on.
    3. With a scan tool, monitor Inlet Air Temperature, EGR Temperature and Coolant Temperature Sensors.
      NOTE:

      Make sure the Ambient Air Temperature is above 20°F.

      NOTE:

      Make sure there is no external heat source, such as a block heater, operating during this test or within the 8 hour cold soak.

      Does the Coolant Temperature Sensor read more than a 18°F (10°C) above or below the other sensors?

      Yes 

      No 

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