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 rocker arm actuator control circuit for Bank 2. This actuator is responsible for adjusting the rocker arm position to optimize valve timing and lift for improved fuel economy and performance. A low circuit signal suggests a short to ground, open circuit, or faulty actuator, which can disrupt engine operation and trigger the check engine light.
01. Most Common Causes
- Faulty rocker arm actuator on Bank 2
- Short to ground in the actuator control circuit
- Open or damaged wiring/connectors in the circuit
- Failed PCM (rare)
02. Symptoms You Will Notice
- Check Engine Light illuminated
- Rough idle or misfire
- Reduced engine performance and fuel economy
- Engine may run in fail-safe mode
03. 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 connectors for Bank 2 rocker arm actuator for damage, corrosion, or loose connections.
Step 3: Measure voltage and ground at the actuator connector using a multimeter; compare to manufacturer specifications.
Step 4: Test the actuator resistance and operation; replace if out of spec.
Step 5: If wiring and actuator are good, check PCM for faults or reprogram if necessary.
04. Commonly Affected Makes
05. Frequently Asked Questions
Is it safe to drive with this code?▼
It is not recommended to drive long distances as it can cause poor engine performance, increased emissions, and potential damage to the catalytic converter. Have it diagnosed promptly.
How much does it cost to fix?▼
Repair costs typically range from $150 to $400, including parts and labor. The rocker arm actuator itself costs $50-$150, plus diagnostic and labor fees.