P2650 moderate

Rocker Arm Actuator A Control Circuit Low Bank 2

The P2650 code means the vehicle's onboard diagnostic system has detected: Rocker Arm Actuator A Control Circuit Low Bank 2. This is a moderate severity code.

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Keep driving?: Short distances only
DIY difficulty: moderate
Estimated cost: $100 - $500 (parts and labor)

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Common Symptoms

Bank 2 VTEC not engaging
Reduced power at high RPM from bank 2
Check engine light on
Uneven power delivery between banks

Probable Causes (Ranked by Likelihood)

Failed bank 2 VTEC solenoid Very High
Low oil pressure at bank 2 actuator High
Bank 2 actuator wiring short to ground Moderate
ECM bank 2 driver failure Low

Step-by-Step Diagnostic Procedure

Test bank 2 VTEC solenoid resistance
Check oil pressure supply to bank 2
Inspect bank 2 actuator wiring for damage
Compare bank 1 and bank 2 VTEC operation

Frequently Asked Questions

Where is bank 2 on a Honda V6?

Bank 2 is the rear bank of cylinders closest to the firewall on Honda V6 engines. It contains cylinders 1, 2, and 3 on most Honda V6 configurations.

Can I swap bank 1 and bank 2 solenoids to test?

If the solenoids are the same part number, swapping can confirm whether the fault is the solenoid or the wiring/ECM driver.

Does P2650 affect fuel economy?

Slightly. Without high-RPM cam engagement on bank 2, the engine is less efficient at higher RPMs, but fuel economy at normal driving speeds may be minimally affected.