P2661 OBD-II Trouble Code: B Rocker Arm Actuator Sys Perf or Stuck Off Bank2

check engine light

P2661 code definition

The P2661 trouble code detects an electrical issue in the rocker arm actuator control circuit for the exhaust camshaft in bank 2 of the engine.

What the P2661 code means

The P2661 code is a standard OBD-II trouble code that notes an issue with the B rocker arm actuator control circuit in bank 2. “B” references the exhaust camshaft (placed on the exhaust side of the cylinder head), while “bank 2” references the specific engine bank that is not home to the number one cylinder. When the powertrain control module (PCM) receives a signal from the exhaust camshaft that deviates by more than 10 percent from the manufacturer’s value, the P2661 trouble code is triggered.

What causes the P2661 code?

There are a few different issues that can trigger the P2661 code, including:

  • Broken oil control valve
  • Open connector or circuit near the oil control valve
  • Insufficient engine oil or oil pressure
  • In rare cases, a malfunctioning PCM

What are the symptoms of the P2661 code?

When the P2661 trouble code is detected, the Check Engine soon Warning Light will likely illuminate on the vehicle’s dash. The engine will likely perform poorly, which may include difficulty idling and hesitation when accelerating.

How does a mechanic diagnose the P2661 code?

The P2661 code should be diagnosing with the help of a standard OBD-II trouble code scanner. A professional mechanic will begin by assessing the freeze frame data to examine the P2661 code, and to search for any other trouble codes that may be present. The trouble codes will then be reset, and the car restarted, to see if the P2661 code persists. If the code does not return, then it was likely erroneously triggered.

If the P2661 code does return, the mechanic should inspect the engine oil levels and pressure. Following that inspection, the connectors and circuits surrounding the oil control valve will be inspected, and the timing indicators should be checked for correct alignment. Then the oil control valve and camshaft sensors should be inspected.

Any time that a component is replaced, the trouble codes should be reset before the inspection continues.

Common mistakes when diagnosing the P2661 code

The most common mistake made when diagnosing the P2661 trouble code comes from a failure to properly follow the basic OBD-II trouble code diagnosis protocol. The diagnosis protocol should be followed, in order, at all times, to make sure that the correct issues are identified and replaced in the right order.

Failure to follow the protocol often results in components being erroneously replaced when the engine oil was the only issue.

How serious is the P2661 code?

A car is still drivable when it has the P2661 trouble code. However, the engine performance for the vehicle will suffer, and further damage can be done to the engine if the issue is not resolved in a timely manner.

What repairs can fix the P2661 code?

Some possible repairs for the P2661 trouble code include:

  • Replacement of an oil control valve
  • Replacement of camshaft sensors
  • Replacement of circuits and connectors associated with the oil control valve
  • Replacement or addition of engine oil
  • Replacement of PCM

Additional comments for consideration regarding the P2661 code

While a malfunctioning PCM can be the cause of a P2661 code, it is extremely rare and should not be considered unless all other possibilities have been checked. In the event that the PCM has failed, it will need to be reprogrammed after being replaced.

Need help with a P2661 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

Ask a Mechanic
(100% Free)

Have a car question? Get free advice from our top-rated mechanics.

Ask A Mechanic
Over 10,000 questions answered!

More related articles

Insurance Requirements for Car Registration in Kentucky
The Kentucky Transportation Cabinet requires that all drivers in Kentucky carry liability automotive insurance, or “financial responsibility” in order to operate a vehicle legally and maintain vehicle...
The Traveler’s Guide to Driving in Malaysia
CraigBurrows / Shutterstock.com Malaysia is a popular destination for many tourists today. The country has amazing sights and attractions that you will want to explore....
How to Get a Louisiana Driver's Permit
s licensing program. The first step in this program is to obtain...

Related questions

Q: What would cause brand new O2 sensors to give codes 172, 173, 176, and 177, rich and lean conditions, both sides at the same time?

When it comes to across-the-board codes being set such as this, it is usually a result of something "upstream" creating the condition to set all these codes. For instance, it is rare for both O2 sensors to fail at exactly...

Q: Speedometer broken; warning lights on

Greetings! When a Check Engine Light goes on then off, a trace of what caused the light to set will usually be left in the vehicle's computer. A technician should retrieve the codes in the computer to see if there...

Q: Check engine light came on while driving

The Check Engine Light is an indicator that something is affecting your emissions in a negative way. This can be as simple as a loose gas cap, to a misfire and many things contribute to the overall emissions output. The...