P2650 OBD-II Trouble Code: “B” Rocker Arm Actuator Control Circuit Open Bank 1

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P2650 trouble code definition

“B” Rocker Arm Actuator Control Circuit Open Bank 1

What the P2650 code means

P2650 is an OBD-II generic code for the engine control module (ECM) detecting the B rocker arm actuator control circuit for bank 1 has an open circuit. This could be anywhere in the actuator circuit.

What causes the P2650 code?

  • The ECM detects an open circuit signal from the B rocker arm actuator and sets the code in memory. The Check Engine Light will then be turned on.

  • The connection to the actuator or the actuator has an open circuit.

What are the symptoms of the P2650 code?

  • The car may run erratic or power will be affected.

  • The Check Engine Light will be illuminated.

How does a mechanic diagnose the P2650 code?

  • Scans codes and documents the code in the ECM to view the freeze frame data for the code

  • Checks the wiring and connector to the actuator to make sure it is okay

  • Performs the manufacture pinpoint test on the B rocker arm actuator to verify if the failed actuator or wiring is open

Common mistakes when diagnosing the P2650 code

  • Replacing the actuator without verifying the open circuit
  • Failing to clear the ECM codes after the system is repaired
  • Replacing parts when the connector is not making contact or broke

How serious is the P2650 code?

  • Code P2650 is a code for the B rocker arm control circuit and will cause the engine to run erratic.

What repairs can fix the P2650 code?

  • Replacing the B rocker arm actuator
  • Repairing the wiring harness or connector to the actuator

Additional comments for consideration regarding the P2650 code

Code P2650 is not a very common code since most vehicles do not have actuators for the rocker arms of the engines they manufacture.

Need help with a P2650 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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