Easy one-page printout for the garage or repair shop
This summary uses the existing diagnostic information shown in full below.
This code means that there's a problem with a sensor that helps control parts of the engine that open and close the valves. It's like a sensor that tells a robot arm where to move, but it's not working right.
The P264B code is triggered when the Engine Control Module (ECM) detects a range or performance problem with the rocker arm actuator position sensor on bank 1.
The rocker arm actuator position sensor monitors the position of the rocker arms, which are responsible for opening and closing the engine's valves. If the sensor's readings are outside the expected range or not performing as expected, the ECM will set the P264B code.
• Check Engine Light is on
• Engine may run rough or misfire
• Reduced engine performance
• Poor fuel economy
• Faulty rocker arm actuator position sensor
• Wiring issues in the sensor circuit
• ECM software issue
• Mechanical issues with the rocker arm actuator
Rocker Arm: A component in the engine that helps open and close the valves.
Actuator: A device that moves or controls a mechanism or system.
• Scan the vehicle for codes and freeze frame data
• Inspect the wiring and connectors for damage
• Test the rocker arm actuator position sensor
• Check for mechanical issues with the rocker arm actuator
• Repair or replace damaged wiring or connectors
• Replace the rocker arm actuator position sensor
• Update the ECM software if necessary
• Repair or replace the rocker arm actuator if needed
• OBD-II scanner
• Multimeter
• Basic hand tools
$150 - $500
Moderate
• Honda Accord
• Honda Civic
• Acura TSX
• Regular maintenance and inspection of engine components
• Ensure proper oil levels and quality
• Address any engine warning lights promptly
Sensor Issue
• Avoid driving the vehicle if performance is severely affected
• Consult a professional mechanic for accurate diagnosis
• Regularly check engine oil levels and quality
Check with the vehicle manufacturer for warranty coverage on engine components.
This code is commonly associated with Honda and Acura vehicles, often due to sensor or wiring issues.
Moderate – Addressing this issue promptly can prevent further engine damage.
Driving with a malfunctioning engine component can lead to reduced performance and potential safety risks.
• Engine at operating temperature
• Vehicle running at idle
The rocker arm actuator position sensor is typically located on the engine cylinder head, near the rocker arms.
Q: Can I drive with a P264B code?
A: It's not recommended to drive with this code as it can lead to reduced engine performance and potential damage.
Q: How can I prevent a P264B code?
A: Regular maintenance and ensuring proper oil levels can help prevent this code.
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Helpful for checking voltage drops, grounds, and basic circuit health when modules are not communicating.
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Useful when diagnosis points toward damaged wiring, corroded terminals, or connector repairs.
Useful if diagnosis points toward damaged connectors, wiring, or terminal repairs.
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Fitment Required · Vehicle-fitment part
Commonly relevant for misfire, ignition-efficiency, and some drivability-related repairs.
Misfire and ignition-related faults commonly involve spark plugs as part of the repair path.
Check the correct plug type, gap, and engine application for your vehicle.
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Fitment Required · Vehicle-fitment part
Relevant when the fault points toward ignition-coil performance or cylinder-specific ignition issues.
Some ignition faults involve coil performance or cylinder-specific coil problems.
Match the coil to your engine and confirm the failed component before ordering.
View options on AmazonThese parts may be related to this fault category, but a code by itself does not confirm exact fitment or guarantee that replacing a part will solve the problem.