P2660 - B Rocker Arm Actuator Control Circuit/Open Bank 2
The P2660 code indicates a problem with the rocker arm actuator control circuit for Bank 2, typically on the right side of the engine. This actuator controls variable valve timing or cylinder deactivation. An open circuit means there is a break in the electrical path, preventing the actuator from functioning. This can cause poor engine performance, reduced fuel economy, and potential engine damage if not addressed.
1. Most Common Causes
- Internal open circuit or damaged coil in rocker arm actuator 'B' solenoid
- Broken, disconnected, or corroded wiring in the actuator control or power circuit
- Bent, oxidized, or poorly seated pins in the actuator connector
- Excessive circuit resistance due to loose terminals or poor splices
- Blown or defective fuse or relay in the actuator power circuit
- Internal PCM failure in the circuit driver (low incidence)
2. Symptoms You Will Notice
- Check Engine Light illuminated
- Rough idle or misfire
- Reduced engine power or hesitation
- Poor fuel economy
3. Step-by-Step Diagnosis
Step 1: Use an OBD2 scanner to confirm the code and check for additional codes.
Step 2: Visually inspect the wiring and connector for Bank 2 rocker arm actuator for damage, corrosion, or loose connections.
Step 3: Test the actuator solenoid resistance with a multimeter; compare to manufacturer specs.
Step 4: Check for voltage and ground at the actuator connector with the ignition on.
Step 5: If wiring and solenoid are good, test the ECM output or consider ECM failure.
4. Frequently Asked Questions
Is it safe to drive with this code?▼
It is not recommended to drive long distances as it can cause engine damage and poor performance. Have it diagnosed promptly.
How much does it cost to fix?▼
The cost typically ranges from $50 to $150 for diagnosis and repair, but can be higher if the ECM needs replacement.
5. Commonly Affected Makes
This is a generic OBD2 code, potentially applicable to any manufacturer using this diagnostic standard.