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Guide To P2651 OBD Error Code Solutions

OBD Code P2651 - B Rocker Arm Actuator System Performance/Stuck Off Bank 1

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Wondering on how to crack the error code P2651? Don’t worry, Parts Avatar to the rescue! Only for you we have listed here all that you need to know about the error code P2651. In order to monitor the oil hydraulic circuit, the engine control module commands the rocker arm actuator. It is through the rocker arm actuator the oil flows to the variable valve timing system to adjust the engine’ valve timing.

Learn More About OBD Error Code P2651

It should be noted that for an improvement in the engine performance, fuel economy or emissions, the variable valve timing (VVT) system is utilized. The rocker arm actuator circuit is monitored by the engine control module (ECM). Further, the ECM sets the error code P2651 when the ‘B’ rocker arm actuator circuit is out of the manufacturers provisions.

What causes this problem with the Rocker Arm Actuator System Performance/Stuck Off Bank 1?

  • The engine oil level or the engine oil pressure low
  • Defective oil control valve Corroded connector or any short circuit near the oil control valve
  • A jammed PCM (rare cases) Either low or overfilled engine oil False engine oil type
  • A malfunctioning ‘B’ rocker arm actuator
  • The harness in the ‘B’ rocker arm actuator loose or burnt
  • A bad electrical connection in the ‘B’ rocker arm actuator circuit

Replace/Repair These Parts To Fix OBD Code P2651

  1. Engine Control Module - Observing a sluggish engine crank, engine stall, check engine light illuminated? Don’t know what to do? Tired of all these problems? Well, it could be due to a defect in the engine control module. Tune into Parts Avatar for your brand new ECM offered at best prices.
  2. Rocker Arm - Facing the error code P2651? An unsound rocker arm can always be hazardous for the system also it is one of the primal causes behind the occurring of the error code P2651. Tune into Parts Avatar for supreme quality rocker arm at economical prices.
  3. Engine Valve - A bad engine valve accompanies problems like engine glitches, decrease in power and a poor fuel economy. Worried? Not anymore! Parts Avatar, your one stop destination has a solution for all your problems. Tune into Parts Avatar if you want to get rid of all these problems and the error code P2651.
  4. Engine Oil Pressure Sensor - This engine oil pressure sensor installed performs the function of determining the apt amount of engine oil present. So a jammed or an unsound one can really be problematic for the vehicle. Mend or restore it now!
  5. Powertrain Control Module - The PCM not functioning? Well, do you have any idea about the extent to which it can damage your system? A faulty powertrain control module brings along issues like a malfunction in the functioning of the entire engine, also the sparks and ignition timing from the spark plugs are controlled and received by the PCM. So to avoid a whole lot of repairs, we simply advise you to change your PCM now. Log into Part Avatar for best quality PCMs at the best prices.
  6. Engine Wiring Connectors - Do you love hitting the roads like we do? But don’t know the reason behind these halts? It could be due to corroded engine wiring connectors. Perform amendments immediately if you want to travel endlessly.
  7. Variable Valve Timing Unit Gasket - The variable valve timing unit gasket help in escalating the engine performance, fuel economy and the emissions. So replace the defective one as it can be very harmful for the vehicle. 

Symptoms Of OBD Error Code P2651

It is vital 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 P2651 here:


Common Symptoms


  • A fall in the engine performance
  • More fuel consumption by the vehicle

How To Correct P2651 B Rocker Arm Actuator System Performance/Stuck Off Bank 1

Want to correct the trouble code P2651? Read these points mentioned below:


  • Repair or replace a defective oil control valve
  • All the corroded connectors and circuitry surrounding the oil control valve should be replaced or repaired
  • All the malfunctioning camshaft sensors should be repaired or replaced
  • Restore or mend the engine oil
  • Change or repair a damaged powertrain control module

Parts Avatar Canada is here to solve all your issues related to car parts. We have stocked a wide range of best priced engine control module, rocker arm, valve, engine oil pressure, powertrain control module, wiring, VVT and a lot more to help you out in fixing your car.

Easy Diagnosis Of Engine Error OBD Code P2651

It is essential to diagnose this fault code. Here are some steps which a mechanic should follow for diagnosing the problem that triggered a P2651 code to be stored:


To begin with, use a standard OBD-II trouble code scanner. The mechanic should then make use of it to observe and document the freeze frame data for the P2651. All the additional codes should be stored too. Then the codes should be reset and a test drive should be performed of the vehicle. If in case, the code fails to return, it should be understood that the code might have been stored erroneously. Although, there are chances of an intermittent error. And if the code reappears, the mechanic should check the engine oil and make sure that the pressure and level is accurate. Then proceed to check the timing indicators. Make sure that they are in proper alignment. If the mechanic fails to find any problems, the oil control valve and the camshaft sensors should be checked.


Common Mistakes When Diagnosing the P2651 Code


Most commonly, the mistake committed by the mechanic is failing to stick the OBD-II trouble code diagnosis protocol. It should be noted that it is important to follow the protocol in the right order. This will make sure that every component is inspected and repaired correctly.

When the mechanic fails to follow the protocol, it might lead to the false replacements of a number of components when the problem could be inadequate oil levels or pressure.

Other Diagnostic Codes Related To OBD Code P2651

P2650 - B Rocker Arm Actuator Control Circuit/Open Bank 1

P2652 - B Rocker Arm Actuator System Stuck On Bank 1

P2653 - B Rocker Arm Actuator Control Circuit Low Bank 1

P2654 - B Rocker Arm Actuator Control Circuit High Bank 1