Easy one-page printout for the garage or repair shop
This summary uses the existing diagnostic information shown in full below.
This code means there's a problem with a part of the engine that helps control how the engine's valves open and close. It's like a switch that isn't working right on one side of the engine.
The P2660 code indicates that the engine control module (ECM) has detected an issue with the rocker arm actuator control circuit on bank 2. This could mean the circuit is open or not functioning properly.
The rocker arm actuator is responsible for adjusting the position of the rocker arms, which in turn control the opening and closing of the engine's valves. An open circuit or malfunction in the actuator control can disrupt this process, affecting engine performance.
• Check Engine Light illuminated
• Rough engine idle
• Decreased engine performance
• Faulty rocker arm actuator
• Open or shorted wiring in the actuator circuit
• Defective ECM
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.
• Use an OBD-II scanner to confirm the code.
• Inspect the wiring and connectors for damage or corrosion.
• Test the rocker arm actuator for proper operation.
• Repair or replace damaged wiring or connectors.
• Replace the rocker arm actuator if faulty.
• Reprogram or replace the ECM if necessary.
• OBD-II scanner
• Multimeter
• Wrench set
$150 - $500
Moderate
• Honda Accord
• Acura TL
• Toyota Camry
• Regular maintenance and inspections
• Promptly addressing Check Engine Light warnings
• Using quality engine oil
Engine Performance
• Do not ignore the Check Engine Light.
• Have the vehicle inspected by a professional mechanic.
• Avoid driving the vehicle if performance issues are severe.
Check with the vehicle manufacturer for warranty coverage on engine components.
This code has been associated with issues in vehicles using advanced valve timing systems.
Moderate – Should be addressed soon to avoid potential engine damage.
Driving with this code may lead to increased emissions and potential engine damage.
• Engine at operating temperature
• Vehicle in park or neutral
The rocker arm actuator is located on the cylinder head, typically on the side of the engine corresponding to bank 2.
Q: Can I drive my car with a P2660 code?
A: It's not recommended to drive for extended periods with this code, as it can lead to engine performance issues.
Q: How can I reset the P2660 code?
A: After repairs, use an OBD-II scanner to clear the code. If the issue is fixed, the code should not return.
High-End · Full-system diagnostics
A full-system bidirectional platform aimed at advanced DIY users and professional diagnostic workflows.
Network faults often require full-system access instead of a generic code reader alone.
View on Amazon
Universal · Digital multimeter
A solid entry-level multimeter for voltage, continuity, resistance, and basic electrical troubleshooting.
Helpful for checking voltage drops, grounds, and basic circuit health when modules are not communicating.
View on Amazon
Universal · Wire connectors and repair kit
Useful when diagnosis points toward damaged wiring, corroded terminals, or connector repairs.
Useful if diagnosis points toward damaged connectors, wiring, or terminal repairs.
View on AmazonThese are optional diagnostic tools, not guaranteed fixes. As an Amazon Associate I earn from qualifying purchases.