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Error Code P2155: What It Means & What To Do?

OBD Code P2155 – Fuel Injector Group D Circuit/Open

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Are you experiencing fall in engine performance? Do you notice affected fuel economy, delayed throttle response and inconsistent idle? If yes, then this can be an indication of the problem with the fuel delivery system of the vehicle, resulting in OBD code P2155 getting stored in the Powertrain Control Module (PCM) of your vehicle.

Learn More About OBD Error Code P2155

If you are wondering what this error code P2155 indicates and how badly it will affect your vehicle, then you are at the right place. We at PartsAvatar are here to help you out with our expert knowledge. OBD error code P2155 is indicative of performance problems with the fuel injector group D circuit being open. In other words, this error code will be set by your vehicle’s powertrain control module when it detects that one or both of the fuel injectors in that group D are not functioning as per the requirements.


What causes this problem with the Fuel Injector Group D Circuit/Open?


  • Bad fuel injector wiring
  • Fuel injector connectors being corroded or faulty
  • Damaged or defective fuel injector driver
  • Blown out fuel injector fuses
  • Issues with the engine control module

Replace/Repair These Parts To Fix Code P2155

  1. ECM - Having problems with your car’s engine control module, also known as the ECM is rare, but if you happen to face it then its recommended to undergo a complete reprogramming of the system to avoid wrong codes from getting stored in the system, leading to misdiagnosis. Replace the damaged ones with us today.
  2. Powertrain Control Module - Faulty PCM? Well, we suggest you to repair it at the earliest as this will cause the system to store wrong OBD error and thus can lead to misdiagnosis. If you need one for your vehicle, you can find one with us.
  3. Fuel Injector - Are you having a faulty fuel injector? Thinking of delaying the repairs? Do not delay replacing your faulty fuel injectors with a new one as faulty fuel injectors will lead not only to OBD error code P2155 but will also affect the fuel economy and engine performance.
  4. Fuel Injection Harness - If you come across damages or defective fuel injection harness then you must think of replacing them. PartsAvatar has a sensible selection of fuel injection harness for you to choose from.
  5. Fuel Injection Connector - if you need fuel injection connectors to correct your obd error code P2155 then you can simply browse through PartsAvatar Canada and get your hands on the best selection of parts available.
  6. Ohmmeter - Take help of a professional mechanic to diagnose OBD code error P2155 or do it yourself with a help of the OHMmeter. Buy new tools and equipment from us!

Symptoms Of OBD Error Code P2155

It is essential 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 P2155 here:


Common Symptoms


  • Abnormal engine performance
  • Affected fuel efficiency
  • Engine misfire codes stored
  • Fall in engine power
  • Fall in throttle response
  • Inability to climb steep hills
  • Weird engine noises
  • Rise in smokes
  • Abnormal idle

How To Correct P2155 Fuel Injector Group D Circuit/Open

Here are some ways with the help of which you will be able to correct the OBD Code P2155

  • Undergo faulty fuel injector replacement
  • Undergo failed PCM replacement and reprogramming
  • 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

There is no need to be anxious as Parts Avatar – Car Parts Online is here to help you out! We have high grade ECM, PCM, Fuel Injector and a lot more for our precious customers.

Easy Diagnosis Of Engine Error OBD Code P2155

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

To begin with you will need to use a scanner to check for the stored error code. Next, 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. If 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 P2155.

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 D 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 D. Lastly remove fuel Injector and observe fuel spray pattern for abnormalities.

Common Mistakes When Diagnosing the P2155 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.

Other Diagnostic Codes Related To OBD Code P2155

P2156 - Fuel Injector Group "D" Supply Voltage Circuit Low

P2157 - Fuel Injector Group "D" Supply Voltage Circuit High