P2648 OBD-II Trouble Code: A Rocker Arm Actuator Control Circuit Low Bank 1

check engine light

P2648 code definition

The P2648 code refers to a short or open electrical circuit in the rocker arm actuator control circuit for intake “A.”

What the P2648 code means

When the code appears in your vehicle, it means that there is an issue, likely a short or open electrical circuit, in the rocker arm actuator control circuit. In this case, it is on the intake camshaft and in the bank of the engine that includes the number one cylinder.

What causes the P2648 code?

The following are some of the causes of the P2648 code:

  • Faulty oil control valve
  • Low oil
  • Open electrical circuit or connector on the oil control valve
  • Faulty PCM, although this is rare

What are the symptoms of the P2648 code?

When the code stores in your vehicle, the Check Engine light will come on and stay on. However, there are some other issues that you are likely to experience when the P2648 code appears. Some of those issues include poor engine performance, choppy acceleration, and a rough and unsteady feel when the vehicle is idling.

How does a mechanic diagnose the P2648 code?

The mechanic will want to hook up their OBD-II scanner to the vehicle’s onboard computer. This will allow the mechanic to gather data on the vehicle that can be useful during the diagnosis. In addition, they will reset the codes and test the vehicle to see if the codes return. In some cases, they won’t. This is because some older vehicles may have stored the codes by mistake. However, if the code does return, the technician knows that there are further problems with which to contend. In addition, the mechanic may reset and test the codes several times during the diagnosis and repair process as they check different areas of the vehicle and make different repairs.

Common mistakes when diagnosing the P2648 code

Sometimes, the technicians are certain that they need to replace components such as the oil control valve or the PCM and they overlook some of the simpler solutions. For example, with the P2648 code, it might simply be stored because of low engine oil level, pressure, or viscosity.

How serious is the P2648 code?

It is vital to treat all codes as important and to have the vehicle repaired as quickly as you are able. With the P2648 code, you might still be able to drive your vehicle when the code is stored, but you will find that the vehicle does not run smoothly. Take the trip to the mechanic so you can get a proper diagnosis and so you can have the vehicle repaired.

What repairs can fix the P2648 code?

The following are some repairs that mechanics can make to take care of the P2648 code.

  • Visually inspect the wiring and electrical connectors, including on the oil control valve, to ensure there is no corroding, fraying, or other connection issues
  • Repair or replace the oil control valve if it is faulty
  • Replace the faulty powertrain control module – keep in mind that this is rare

Additional comments for consideration regarding the P2648 code

If you have low oil level or low oil pressure in your vehicle, it could actually contribute to this issue and you could be more likely to get the P2648 code to appear in your vehicle. Regardless of whether you have issues driving or not, if you have any codes stored in your car or truck, it is very important that you take care of them sooner rather than later. A good mechanic can diagnose the vehicle and take care of the needed repairs so you don’t have to worry.

Need help with a P2648 code?

YourMechanic offers certified mobile mechanics who will come to your home or office to diagnose and repair your vehicle. Get a quote and book an appointment online or speak to a service advisor at 1-800-701-6230.

The statements expressed above are only for informational purposes and should be independently verified. Please see our terms of service for more details

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