P2655 - Rocker Arm Actuator Control Circuit/Open Bank 2
The P2655 code indicates a problem in the rocker arm actuator control circuit for Bank 2. This system varies valve lift for improved performance and fuel economy. The Powertrain Control Module (PCM) detects an open or short circuit in the actuator solenoid or wiring. This can cause the engine to run poorly, with reduced power and fuel efficiency.
1. Most Common Causes
- Faulty rocker arm actuator solenoid
- Open or shorted wiring in the actuator circuit
- Corroded or damaged connector
- Failed PCM (rare)
2. Symptoms You Will Notice
- Check Engine Light on
- Reduced engine performance and fuel economy
- Rough idle or misfire
- Engine may run in fail-safe mode
3. Step-by-Step Diagnosis
Step 1: Scan for codes and record freeze frame data.
Step 2: Visually inspect wiring and connectors for damage or corrosion.
Step 3: Test actuator solenoid resistance and compare to specs.
Step 4: Check for power and ground at the solenoid connector.
Step 5: If wiring and solenoid are good, test PCM output.
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 performance and potential engine damage. Have it diagnosed promptly.
How much does it cost to fix?▼
Repair costs vary; typically $50-$150 for diagnosis and part replacement, but could be higher if wiring repairs or PCM replacement is needed.
5. Commonly Affected Makes
This is a generic OBD2 code, potentially applicable to any manufacturer using this diagnostic standard.