P2659 Fault Code

A Rocker Arm Actuator Control Circuit High Bank 2

• What does that mean?
• Symptoms
• Causes
• Solutions

The P2659 fault code indicates an issue with the Rocker Arm Actuator Control Circuit on Bank 2 of the engine. This circuit is responsible for regulating the variable valve timing, which optimizes engine performance and efficiency. When the control circuit registers as being 'high,' it typically points to an electrical problem, such as a short circuit or an issue with the actuator itself. Understanding this code is crucial for diagnosing performance issues related to valve timing adjustment.

What are the symptoms of the P2659 code?

Symptoms of a P2659 code may manifest as:

• Check Engine Light (CEL) illuminated on the dashboard.
• Reduced engine performance, including loss of power or acceleration.
• Noticeable engine noise due to improper valve operation.
• Rough idling or stalling when trying to start the engine.
• Decreased fuel efficiency owing to poor timing adjustments.

What causes the P2659 code?

Common causes for the P2659 fault code include:

• Faulty rocker arm actuator on Bank 2.
• Damaged or frayed wiring in the actuator control circuit.
• Poor electrical connections affecting the circuit integrity.
• Failed engine control module (ECM) or software glitches.
• Oil flow issues to the actuator, which can cause it to malfunction.

How to fix P2659?

To resolve the P2659 fault code, the following steps are recommended:

• Inspect the rocker arm actuator for any visible damage or wear. Replace if necessary.
• Check the wiring and connectors in the actuator control circuit for shorts, corrosion, or loose connections.
• Test the voltage and ground at the actuator to ensure proper electrical function.
• Clear the fault code using an OBD-II scanner after repairs and take the vehicle for a test drive to see if the code returns.
• If the code persists after repairs, consider checking the engine control module or performing further diagnostic tests on the vehicle's performance.