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P0119 - OBD Trouble Code

OBD Code P0119 - Engine Coolant Temperature Circuit Intermittent

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The P0119 fault code can be described as an engine coolant temperature sensor circuit intermittent malfunction problem. It is a generic code which indicates that the engine control module has detected intermittent ECT sensor input.

Learn More About OBD Error Code P0119

The engine coolant temperature sensor is used to detect the engine coolant temperature. The sensor would modify the voltage signal from the engine control module. This modified signal would then return to the engine control module as the engine coolant temperature input. A thermistor is used by the sensor which is sensitive to the change in the temperature. The electrical resistance of the thermistor would decrease with an increase in the temperature.

 

What causes this problem with the Engine Coolant Temperature Circuit Intermittent?

  • The engine coolant level can be low
  • There can be some faults in the thermostat
  • Defective ECT sensor
  • The wiring of the connectors in the ECT sensor circuit might be opened or shorted

Replace/Repair These Parts To Fix OBD Code P0119

  1. Engine Coolant Temperature Sensor - The P0119 code can also arise due to some issues in ECT Sensor. So, it is advised to replace them as soon as possible.
  2. Engine Wiring Connector - P0119 code does not really end up spoiling your PCM, but it might also accompany few Engine Wiring Connector issues. We have best Engine Wiring Connector related parts with us.
  3. Powertrain Control Module - A broken Powertrain Control Module can cause a lot of issues. It would be nice if you get it replaced on time.
  4. Engine Control Module - Defective Engine Control Module can be a major reason why P0119 code depicts. So, make sure to replace it online so that you don’t have to face any further issues.
  5. Air Fuel Ratio - Everything is okay with the timing chain and still OBD code P0119 triggering? Then there must be some defects in Air Fuel Ratio. Replace them as soon as possible.
  6. Fuel System - Do you remember when was the last time you got your car Fuel System checked up? A damaged Fuel System can cause a lot of issues like displaying P0119 code.

Symptoms Of OBD Error Code P0119

It is very important to know the symptoms of an issue as only then you would be able to solve the problem. So that’s why we have listed out some major symptoms of OBD Code P0119 here:

 

Common Symptoms

 

  • The engine control module can start turning on check engine light and would go into the failsafe mode, substituting input to 176 deg F
  • The engine may start facing a hard start when the engine is cold, and will start normally when warm
  • The engine can start running roughly and hesitate until the engine warms up
  • The engine should run close to normal once the engine warms up
  • If the ECT input is intermittent, then the ECM would start going in and out of failsafe mode, this would cause the engine to run erratically

How To Correct P0119 Engine Coolant Temperature Sensor Circuit Intermittent

  • The other ECT sensor codes should be first tested and replaced
  • The ECT connector should be repaired or replaced
  • You must repair or replace an open wire or short as needed
  • The ECT should be replaced with a new sensor
  • You can always replace the ECM if shorted out

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Easy Diagnosis Of Engine Error OBD Code P0119

  • You can visually check to see if coolant is full, and that the system as well as thermostat are working correctly
  • Then you can scan and document the codes that are received and view the freeze frame data to see when the code was set
  • The OBD-II fault codes should be cleared and then you should retest the vehicle to see if the code comes back
  • Carefully observe the sensor’s live data on the scanner to ensure that the temperature output is within specifications while wiggling the sensor connector and wiring
  • Once you find out that no problems are actually noted, then the next step for the technician is to disconnect and check the sensor and connector for problems like corrosion or loose connections. Replace the corroded sensors and connectors

 

Common Mistakes When Diagnosing The P0119 Code

 

  • The most common mistake is to not perform a visual inspection first
  • Make sure that you perform tests on codes P0117 or P0118 first
  • The ECT sensor should not be replaced unless tests indicate a problem
  • Not connecting the new ECT sensor can turn out to be a big mistake and viewing the ECM data to see if the temperature output from the sensor is close to the same as ambient temperature before installation

Other Diagnostic Codes Related To OBD Code P0119

P0115 - Engine Coolant Temperature Sensor Circuit 1 Malfunction

P0116 - Engine Coolant Temperature Sensor Circuit 1 Range/Performance Problem

P0117 - Engine Coolant Temperature Sensor Circuit 1 Low Input

P0118 - Engine Coolant Temperature Sensor Circuit 1 High Input