Error Code P2146: What It Means & What To Do?

<<See All OBD Codes

This is a generic OBD-II code, but can cause some level of anxiety if you don’t know what it means! But don’t worry, we have you covered and will give you all the information you need to understand this code and also resolve it. The P2146 code is set by the Engine Control Module or ECM. The ECM module will set this code when it will notice that the fuel injector group “A” supply circuit is open and hence not functioning properly.

The P2146 is defined as Fuel Injector Group “A” Supply Voltage Circuit/Open. Your vehicle's Powertrain Control Module controls the signals that go to the fuel injectors. These go in groups of two, if it detects that any of the two fuel injectors in that specific group is not working properly it will set the P2146 code. As a result, both injectors in the group will be disabled in order to prevent damage to other related or connected components.

What causes this problem with the Fuel Injector Group “A” Supply Voltage Circuit/Open?

• Check engine light is on
• Presence of a broken wire or connector in the circuit of supply voltage

1. Fuel Injector - Has the important task of delivering fuel to the engine. If any fault is found with it, try to repair or go for replacement with us. We can help you resolve your P2146 error online. It’s quick and easy.
2. Powertrain Control Module - This is the brain of your engine management system, all codes can be set due to an issue with the PCM. Hence if you’re finding any issues in it, repair or replace. You can find superior quality PCMs at PartsAvatar Canada. Order online and receive it within a matter of days. We offer free shipping on orders above CAD $99.
3. Diagnostic Tools - Faulty or inaccurate diagnostic tools will cause confusion and not help you to resolve the P2146 code. Find the perfect one from PartsAvatar.
4. Engine Control Module - Performs various important functions that help your vehicle to run smoothly. It is the computer of your vehicle, don’t delay repair if the P2146 code is flashing. If needed replace with PartsAvatar order from the comfort of your home, and have it delivered right to your doorstep.
5. Engine Wiring Connector - Fault or damaged connectors can interfere with the performance of the vehicle. Repair or replace as needed. You can find the best quality at affordable prices at PartsAvatar. Order online today.

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 P2146 here:

Common Symptoms

• OBD code is set and the Check Engine Light is on
• Engine runs very rough or stalls when on
• Difficulty in starting engine
• Engine doesn’t operate after starting

Here are some ways with the help of which you will be able to correct the OBD Code P2146

• Repair or replace all the faulty circuitry and wiring
• Repair or replace inaccurate diagnostic tools
• Repair or replace the shorted injector
• Repair or replace the ECM
• Repair or replace the damaged injector harness

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

Here are some steps which you should follow in order to diagnose the P2146 fault code:

Start by scanning all the codes stored, for this you will have to connect your diagnostic scanner to the vehicles diagnostic port. Freeze frame the data and solve in the order of occurrence. At times the codes set prior to the P2146 code can cause issues and be the reason for this code to set. Now take your vehicle on a test drive and see of the code sets. If it doesn’t then it was most likely an issue with the previous codes, if it sets you can continue your diagnostics.

Measure the voltage present on the injector supply circuit. It should be as per the manufacturer's prescribed limits. To find out what those are you can simply refer your vehicles Technical Service Bulletins or TSB. These will have all the information needed for diagnosis and also details on how to find the specific components and parts for conducting tests. Be sure to match the TSB accurately with your vehicle's make, model and engine as well as year of manufacturer.

Also, it’s important to perform a thorough visual inspection of the wiring and connectors that run up to the supply circuit. You may be able to find breaks or loose connections, apart from damages like burning, shorted or corroded connectors etc. Repair and replace as needed and then clear the codes and test drive vehicle to see if the issue has been resolved.

If after all the components are checked, and fixed and the code persists then there may be an issue with the ECM. To be sure, take help from a trained diagnostician and professional. In case your have to reinstall a new ECM, programming will be needed.

Common Mistakes When Diagnosing the P2146 Code

• Clearing the codes stored without freeze framing the data
• Not clearing the codes after fixing the issue
• Not conducting tests thoroughly and diagnosing the wrong part for repairs or replacement