P2663 - B Rocker Arm Actuator Control Circuit Low Bank 2
The P2663 code indicates that the powertrain control module (PCM) has detected a low voltage condition in the control circuit for the 'B' rocker arm actuator on engine bank 2. This actuator is part of a variable valve timing or cylinder deactivation system, and the low circuit signal suggests a short to ground, open circuit, or faulty actuator. Bank 2 refers to the side of the engine opposite cylinder #1. This issue can affect engine performance and fuel economy.
1. Most Common Causes
- Faulty or internally damaged rocker arm actuator on bank B
- Control circuit wiring shorted to ground
- Corroded, loose, or high-resistance electrical connection at the actuator connector
- Actuator coil resistance out of specification or open circuit
- Engine control module (ECM/PCM) failure preventing correct control voltage supply
- Oil supply issue affecting hydraulic actuator operation (blockage or low pressure)
- Defective fuse or relay for the VVT circuit power supply
2. Symptoms You Will Notice
- Check Engine Light illuminated
- Reduced engine power or hesitation
- Poor fuel economy
- Rough idle or misfire
3. Step-by-Step Diagnosis
Step 1: Use a scan tool to confirm P2663 and check for related codes.
Step 2: Visually inspect the wiring and connector for the Bank 2 'B' rocker arm actuator for damage, corrosion, or loose connections.
Step 3: Measure the resistance of the actuator solenoid; compare to manufacturer specs (typically 10-30 ohms).
Step 4: Check for voltage at the actuator connector with the engine running; should see battery voltage. If low, test the circuit for shorts or opens.
Step 5: If circuit and actuator test OK, suspect a PCM issue; perform a PCM update or replacement if necessary.
4. Frequently Asked Questions
Is it safe to drive with this code?▼
It is not recommended to drive long distances as it can cause reduced engine performance and potential damage to the valve train. Have it diagnosed promptly.
How much does it cost to fix?▼
Repair costs typically range from $150 to $400, including parts and labor. The actuator itself costs $50-$150, plus diagnostic time.
5. Commonly Affected Makes
This is a generic OBD2 code, potentially applicable to any manufacturer using this diagnostic standard.