P264B Fault Code

A Rocker Arm Actuator Position Sensor Circuit Range/Performance Bank 1

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

The P264B fault code indicates an issue with the Rocker Arm Actuator Position Sensor Circuit located on Bank 1 of the engine. This sensor plays a crucial role in managing the variable valve timing system, ensuring optimal engine performance and efficiency. When the circuit range or performance falls outside the expected parameters, the engine control module (ECM) detects this irregularity and triggers the error code.

What are the symptoms of the P264B code?

Symptoms of a P264B fault code often manifest as:

• Engine performance issues, such as rough idle or hesitation during acceleration
• Reduced fuel efficiency
• Engine noise due to improper valve timing
• Possible illumination of the check engine light
• In some cases, the engine may enter limp mode to prevent further damage

What causes the P264B code?

Common causes for the P264B code include:

• Faulty rocker arm actuator position sensor
• Wiring issues, such as frayed or damaged wires
• Poor electrical connections at the sensor or ECM
• Low engine oil level or dirty oil affecting actuator functionality
• Malfunctioning engine control module (ECM)

How to fix P264B?

To resolve the P264B fault code, follow these steps:

• Inspect the wiring and connectors related to the rocker arm actuator position sensor for any signs of damage or corrosion.
• Test the rocker arm actuator position sensor for proper operation; replace if faulty.
• Check the engine oil level and quality, ensuring it meets manufacturer specifications and is free from contaminants.
• Clear the fault code with a scan tool and conduct a test drive to verify that the issue has been resolved.
• If problems persist, consider checking the ECM for faults or reprogramming.