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P2154 - OBD Trouble Code

OBD Code P2154 – Fuel Injector Group C Circuit High

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Is the Check Engine Light illuminated on the instrument panel of your car? Is your vehicle’s engine making some weird noises? If your answer is “YES” then there is a possibility that your vehicle is indicating a fault with the fuel injector group C circuit being high, and this is diagnosed as an OBD P2154 error code. To know more about this error code P2154 and it’s few common causes and symptoms take a look at the sections below.

Learn More About OBD Error Code P2154

Are you wondering what this fault with the fuel injector translates into? The engine control module (PCM) is responsible for controlling the signals to the fuel injectors in group of two. Error code P2154 will be set by your car’s pcm when it detects that one or both of the fuel injectors in group C are not functioning as desired. As a result the two injectors in group C will be disabled in order to prevent any further damage to all the related components.


What causes this problem with the Fuel Injector Group C Circuit High?


  • Poor or faulty fuel injector or fuel injectors
  • Faulty fuel injector wiring harness
  • Malfunctioning internal wiring
  • Internal issues with the car’s ECM (Engine Control Module)
  • Problems with the fuel injector connector

Replace/Repair These Parts To Fix Code P2154

  1. Engine Control Module - Your car’s ecm performs various important functions that help your vehicle to run smoothly. It is the computer of your vehicle, don’t delay it’s repair if the P2154 code is flashing. If needed replace with PartsAvatar order from the comfort of your home, and have it delivered right to your doorstep.
  2. Powertrain Control Module - A faulty Power Control Module (PCM) can become irregular to an extent that your car will fail to start or will begin to stall while running. You will notice that exhaust fumes are shorted while the car is running and emissions system control indicators are decreasing. So having a PCM that isn’t working properly is not a good idea, you need to have it replaced right away to resolve the obd error code P2154.
  3. Fuel Injector - In order to avoid rough engine running and drivability issues you must check your vehicle’s fuel injector. If faulty they can lead to OBD error code P2154. If you are already facing this error code then we recommend you to replace the defective ones with new ones with us today.
  4. Fuel Injection Harness - P2154 error code might have to do with faulty fuel injection harness of your vehicle. You can find the fuel injection harness that is best suited to your car right here at PartsAvatar.
  5. Fuel Injection Connector - Continuously exposed to engine heat, wear and tear is a common phenomena for fuel injection connectors. This makes them more prone to damage and might require replacement quite early in it’s life. If you need one to get rid of this error code P2154, you can find brand new fuel injectors with us at PartsAvatar.
  6. Ohmmeter - In order to be that DIY guy, you need a few diagnostic tools to get your car problems sorted out easily. Our diagnostic tools collection can come in handy, so why not have a look?

Symptoms Of OBD Error Code P2154

Willing to know some common symptoms of OBD Code P2154? Your wish is our demand. Have a look at them below:

Common Symptoms

  • Unpredictable engine performance
  • Misfires
  • Decline in fuel efficiency
  • Unpredictable idle conditions
  • Increased smoke
  • Weird engine noises
  • Fall in engine power
  • Vehicle’s non- ability to climb steep hills
  • Fall in throttle response

How To Correct P2154 Fuel Injector Group C Circuit High

We have listed out so ways which would help you to correct the occurrence of OBD Code P2154. They are mentioned here as follows:

  • Start by repairing or replacing the damaged, shorted, open, or loose injector wiring and connectors
  • After that, next step is to repair or replace the faulty fuel injector and the circuit
  • Next on the list is to replace the blown or damaged fuses with a new one
  • You will also need to repair or replace damaged or blown circuits and all the fuel injector related components
  • Lastly make sure to repair or replace damaged or defective ECM, Although you will need to do this in rare cases.

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 PCM, ECM, Fuel Injector and many more. Now all your problems would vanish within no time.

Easy Diagnosis Of Engine Error OBD Code P2154

If you want to easily diagnose this fault code, then all you have to do is to follow the steps which are mentioned below:

  • You will need to use a scanner to check for the stored error code in order to diagnose OBD error code P2154.
  • After that you will have to connect a scanner to the diagnostic port of the vehicle and recover the codes and freeze frame data. This will help you in further diagnosis. Now you will need to conduct a road test and check what all codes return.
  • In case you come across any other codes related to fuel injector system we would recommend you to get rid of them first before attempting to solve the error code P2154.
  • To undergo a complete diagnosis of this error code, you will need few tools such as diagnostic scanner, a digital volt/ohmmeter, and a reliable vehicle information source. While diagnosing make sure that you carefully check the for the constant power supply to the Fuel Injector Group C using ohmmeter.
  • Next, make sure you check all the fuel injection system fuses and relays for any damage. Also conduct a continuity and resistance test for circuits related to Fuel Injector Group C.
  • Lastly remove fuel Injector and observe fuel spray pattern for abnormalities.

Common Mistakes When Diagnosing the P2154 Code

There are chances that you undergo engine control module replacement, but it might not be needed. This way you will end up spending unnecessary bucks on your car. The code could be solved with a simple computer learn procedure or ecu reprogramming. Therefore a proper diagnosis is always recommended.

  • Bad fuel injector
  • Failing car’s PCM
  • Issues with the wiring

Other Diagnostic Codes Related To OBD Code P2154

P2152 - Fuel Injector Group "C" Supply Voltage Circuit/Open

P2153 - Fuel Injector Group "C" Supply Voltage Circuit Low