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Guide To P2184 OBD Error Code Solutions

OBD Code P2184 - ECT Sensor #2 Circuit Low Input

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The trouble code P2184 can be described as ECT Sensor #2 Circuit Low Input. The error code P2184 would start triggering when the PCM would detect some fault in engine coolant temperature sensor 2. One thing which you must keep in mind that its symptoms as well as causes would surely vary as it depends upon a number of things.

Learn More About OBD Error Code P2184

This trouble code is generic, which would mean that it can apply to all the vehicles which are equipped with the OBD-II or the vehicles which are made since 1996 up to the present. The specifications on the definition, the troubleshooting steps as well as repairs can always vary from one vehicle make to another. This can happen because of a lot of reasons and the mechanic should diagnose the specific cause for this code. The P2184 trouble code would indicate that a engine coolant temperature sensor 2 which is not as per the predetermined limit has been detected by the ECM. Now when this would occur, the fault code would be stored and there would be an illumination in the malfunction indicator light.


What causes this problem with the ECT Sensor #2 Circuit Low Input?


  • Defaults in the #2 ECT sensor
  • There might be short to ground on ECT #2 signal circuit
  • There can be inoperative connectors
  • Wiring harness might be defective
  • ECT or PCM might have loose terminals
  • The car engine might be overheated
  • Unusable PCM

Replace/Repair These Parts To Fix Code P2184

  1. Engine Control Module - Is your car engine light still staying ON after resetting or your car engine is turning off for no reason? Then these are some common symptoms indicating that your car engine control module is defective.
  2. Engine Coolant Temperature Sensor - Did you just see black smoke coming out from your vehicle’s exhaust? Black smoke is an indication that you should not drive your vehicle as there might be some fault in the engine coolant temperature sensor. Buy engine coolant temperature sensor from us online at affordable prices.
  3. Powertrain Control Module - The PCM works as the central computer system in an automobile’s mechanism. This auto part is the in charge of all the constituents as well as the functions performed by them. Having such enormous importance in the operation of all the parts means that any defect in it will affect almost every aspect of a car.
  4. Engine Wiring Harness - Is your car battery losing charge very quickly as well as frequently? Then it is an indication that your car engine wiring harness has some major issues. Get it inspected and replaced as soon as possible.
  5. Electronic Control Unit - The ECU is a major component of your car's onboard computer. It's used to regulate many systems and subsystems in your car's engine, drive train and other major components. Visit us to buy best quality ECU online.
  6. Diagnostic Tools - Take help of a professional mechanic to diagnose OBD code error. Use high grade diagnostic tools to resolve this issue. Buy new tools and equipment form us!

Symptoms Of The OBD Error Code P2184

Our main motive is to achieve customer satisfaction and that’s why we will help you to diagnose P2184 code by mentioning some major symptoms below:


Common Symptoms


  • Illumination in the service engine soon light
  • Decline in the fuel economy
  • Bad drivability
  • Engine may run unevenly or blow black smoke out the tailpipe
  • Issues of car engine idling
  • Car engine might start and then may suddenly die

How To Correct P2184 ECT Sensor #2 Circuit Low Input

If you wish to correct this fault code, then you have to follow certain steps. Correcting a problem needs your careful attention. Here are some ways with the help of which you will be able to correct the OBD Code P2184:


  • You must fix the wiring of the ECT #2 sensor.
  • Make sure to mend the faulty engine control module.
  • Repair or replace the quirky ECT #2 sensor.
  • Recondition the non-functioning connection of the ECT sensor.

There is no need to get strained if your OBD Code is still flashing up as we are here at your service. Have a look at our superior variety of ECT sensor, wiring, connectors, PCM, ECM, air fuel ratio sensor, battery connectors, spark plug, distributor coil, fuel injection system, auto ignition system and many more. Now all your problems would vanish within no time.

Easy Diagnosis Of Engine Error OBD Code P2184

Here are some steps which you should follow in order to diagnose this fault code:


  • Use an OBD-II scanner in order to verify that the code is present, and check for other codes for any other type of error or problem that might need attention.
  • The current data along with freeze frame data are recorded, and the codes are then cleared to see if they reoccur.
  • After that the mechanic should scan the codes as well as the codes should be documented in the engine control module. Then he should carefully look at the freeze frame data for some faults.
  • Make sure that you scan the engine only when it has been sitting for at least 8 hours and it should be at ambient temperature.
  • Then he should scan the engine control module and the readings for the two ECT sensors should be inspected properly as well as the ambient air temperature sensor to see if the ECT #2 sensor is dissimilar from the other two sensors. Keep in mind that all three should be within a few degrees of each other.
  • Sometimes there might be issues related to loose or corroded pins, so the ECT sensor connector should be inspected properly.
  • Make sure to restore the #2 ECT sensor if all the wirings are in good working condition and if the Ohm's test displays that it is out of specifications.

Common Mistakes When Diagnosing The P2184 Code


  • It is very important to clear the memory of the ECM codes before you start examining the freeze frame data for the main issue, so the failure might be identical and restored.
  • Most of the times mechanics fail to clear the codes of the engine control module once the codes are fixed.
  • Many a times the mechanics might simply replace the ECT sensor; while in reality there can be just a need to repair the damaged connector.

Other Diagnostic Codes Related To OBD Code P2184

P2182 - Engine Coolant Temperature Sensor 2 Circuit

P2183 - Engine Coolant Temperature Sensor 2 Circuit Range/Performance

P2185 - Engine Coolant Temperature Sensor 2 Circuit High

P2186 - Engine Coolant Temperature Sensor 2 Circuit Intermittent/Erratic