P266C Fault Code

A Rocker Arm Actuator Position Sensor Circuit Low Bank 2

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

The P266C fault code indicates a low voltage condition detected in the Rocker Arm Actuator Position Sensor circuit for Bank 2. This code is specifically related to the Variable Valve Timing (VVT) system in the engine, which is responsible for optimizing engine performance by adjusting the timing of the valves. A malfunctioning sensor can lead to poor engine performance, reduced fuel efficiency, and increased emissions.

What are the symptoms of the P266C code?

Symptoms associated with the P266C code may involve:

• Illuminated check engine light
• Decreased engine performance
• Rough idling or misfires
• Poor acceleration and reduced power
• Increased fuel consumption and emissions
• Engine noise due to improper valve timing

What causes the P266C code?

Common causes for the P266C code include:

• Faulty Rocker Arm Actuator Position Sensor
• Damaged wiring or connectors within the circuit
• Issues with the Engine Control Module (ECM)
• Low engine oil levels affecting VVT operation
• Mechanical problems with the rocker arm system

How to fix P266C?

To resolve the P266C code, the following steps can be taken:

• Inspect and repair any damaged wiring or connectors related to the Rocker Arm Actuator Position Sensor on Bank 2.
• Test the Rocker Arm Actuator Position Sensor for proper operation and replace it if faulty.
• Ensure the engine oil is at the correct level and of good quality, as this impacts the VVT system's performance.
• Reset the ECM to clear the fault codes and monitor for any reoccurrence.