Home » P2148 code: PCM detects high resistance in fuel injector voltage

P2148 code: PCM detects high resistance in fuel injector voltage

Code P2148When you own a car, you must learn about it so that you can properly maintain it. So every car owner needs a self-diagnostic tool known as an OBD2 scanner. It can scan the entire engine system of a vehicle and notify the driver if an accident or occurrence takes place. Some also include a decoding system for those codes. Similarly, when your car’s engine encounters a problem in a specific part of the fuel injecting circuit, it generates a trouble code. And one of them is the code P2148. Let’s look into what this error code signifies and how to repair this.

What is the meaning of the trouble code P2148?

Because this fuel injector is now an integral part of many updated cars, this issue is most frequently seen in updated vehicles. This injector is primarily used to control the emission rate of the car’s exhaust system. This injector is a carburetor replacement that is more efficient and controls the rate of fuel emissions, attempting to make the car more environmentally friendly. Not only does this dispenser save the environment, but it also consumes less fuel than older vehicles, saving you money.

Then we’ll discuss the specifics of where this problem originated. The letter “A” is primarily used to refer to the precise location of the problem. And this varies with different car brands and uses a specific method to determine how to solve it. After that, you can figure out the source of the check engine light and ensure that the problem is in the fuel injector system or its circuit. Sometimes the fuel injectors’ harness routers are routed in close proximity to extreme heat. You may also notice a burned circuit in there, which is also the cause of this problem.

Common Symptoms:

The symptoms of this error code P2148 are given below:

  • Illuminated check engine light,
  • Erratic idle,
  • Misfire while starting the car,
  • Reduced fuel economy,
  • Dark and bad odor smoke coming out from the exhaust system,
  • Extra noise from the engine,
  • Lack of power, 
  • Can’t climbs on the step of the hills,
  • Decreased throttle response,
  • Engine stall or sometimes don’t start at all,
  • The car engine runs unstable sometimes,
  • Instability notice on the engine performance.
  • Floating revs.

Possible Causes:

There is not only one reason for this problem; rather, a variety of causes are to blame, which also are listed below:Fuel injectors

  • Damaged fuel injectors,
  • Open or short circuit on the electric wires connected with group A injectors,
  • Damaged or loose wiring on the injectors of group A,
  • Defective powertrain control module or PCM and engine control module or ECM,

How serious is this error code P2148?

If you read the symptoms of this problem, you will understand how severe this trouble code is. The lack of fuel in the combustion system is referred to as the car’s lean state. As a result, when your car is in a lean state, it consumes more fuel than usual and increases the risk of serious engine damage. That is the main flaw in this trouble code. You may experience misfires while starting the car, causing the performance of the engine to suffer.

The most distressing aspect is that the engine starts making noise and generates a black and foul-smelling fume from the exhaust side of the vehicle. This is not good for the environment. That is why this code is extremely hazardous to both your car and the environment. It also raises fuel consumption. So, if you want to save money while also saving the environment from pollution, try to fix this code as soon as possible.

How to diagnose the issue P2148 code?

Every professional and DIY technician follows some basic steps, and if you want to solve this yourself, you must carefully follow all of these steps. And they are as follows:

  • Connect the digital car scanner and test all of the car’s systems. Then, scan the ECM document using the freeze frame data to determine where the failure is.
  • After that, visually inspect all of the fuel injector connections and wires, as well as the wiring harness, to see if any physical damage has occurred.
  • Disconnect all of the injection system’s power supply sires of the injectors to test the short power system.
  • After that, connect one injector at a time to see if any parts are shorted, as well as test the resistance of the shorts.

And this is the first step in error handling the system. This is a technical issue, so if you get confused, consult your car manual. The main cause of this confusion is that the fuel injector’s location distinguishes car brands. So, you do not apply your knowledge of one car brand to another. To use the car’s manual book to ensure every part of the car is always recommended for this reason.

Common Mistakes

There are some common mistakes you make when troubleshooting the system. For example, forget to clear the ECM memory code before inspecting the freeze frame data. As a result, you simply go through old results and get duplicates. And you’ll get the same result until you reset the car’s ECM. Another is failing to reset the ECM after the code has been repaired. So, whenever you change the ECM, try resetting the system. Another issue is that many people believe the problem is related to the fuel injector and that they must replace the entire system to resolve it. However, if only one injector is faulty, you only need to replace the faulty one, not the entire system. Don’t make any changes without first having to consult a specialist.

How to fix this error code P2148 from the system?

Now talking about how to remove the error code P2148 from the system. And those are:

  • The first step is to clear all codes from the OBD scanner. Every time this device displays stored memory, and to ensure that this code is correct, the car is tested. After that, test the system again with a scanner and investigate the freeze frame data to determine where the problem is. If you find the code after it, it is still in the system; if it does not return, the issue was in the past, but it is no longer present in the system.
  • After that, inspect the car’s fuel injector and, if necessary, try to replace it. If this is not possible, you must replace the faulty fuel injector from there.
  • Then inspect the car powertrain control module. Loose wiring or connectors can also cause problems with fuel injectors and generate the code. If you find any loose wiring connections, tighten them; if the connectors become damaged, replace them. After that, determine whether or not the PCM is operating correctly. If not, your car’s PCM has been damaged and must be removed. Install it correctly, then check to see if the PCM is working properly.

The main cause of this problem is physical damage to any part of the fuel injection system. If you get confused, you can get assistance from technical support online, which has very comprehensive information on how to solve this type of problem. So you can get all the information there. However, my suggestion is to contact your technician. They can assist you speedily and ensure that the situation is fixed in the system.

Repair Cost:

Initially, the problem was primarily caused by a high supply voltage in the fuel injector group A. This fuel injector is an essential component of any modern vehicle. As a result, the number of injectors varies by vehicle brand. This part’s cost varies depending on the vehicle. However, the estimated cost of repairing this code is around $120. Now let’s talk about labor costs. For a professional, solving this code should take no more than one hour. So, to sum up, you need $180-$250 to fix it.

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