P266D Fault Code

A Rocker Arm Actuator Position Sensor Circuit High Bank 2

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

The P266D fault code indicates that there is an issue with the Rocker Arm Actuator Position Sensor Circuit on Bank 2 of the engine. This sensor plays a crucial role in regulating the engine's variable valve timing, which optimizes performance and efficiency. When the circuit detects an abnormal high signal, it triggers the fault code.

What are the symptoms of the P266D code?

Common symptoms associated with the P266D fault code may include:

• Illumination of the check engine light.
• Decreased engine performance or power.
• Rough idling or stalling.
• Poor fuel economy due to inefficient valve timing.
• Unusual noises from the engine, often referred to as 'ticking' or 'knocking' sounds.

What causes the P266D code?

Possible causes for the P266D code include:

• A faulty rocker arm actuator position sensor.
• Wiring issues such as short circuits, frayed wires, or poor connections.
• An issue with the Engine Control Module (ECM) that processes the signal from the sensor.
• A malfunctioning rocker arm actuator that may be causing incorrect readings.

How to fix P266D?

To resolve the P266D fault code, follow these steps:

1. Inspect the wiring and connectors related to the rocker arm actuator position sensor for damage or corrosion.
2. Test the rocker arm actuator position sensor with a multimeter to ensure it is functioning within specifications.
3. Replace the sensor if it is found to be faulty.
4. Check the rocker arm actuator for proper operation and replace if necessary.
5. Clear the fault code and conduct a test drive to confirm that the issue has been resolved.