What Does P2655 Mean?
The ECM has detected an open circuit or electrical fault in the control circuit for the 'A' rocker arm actuator on Bank 2. This prevents proper control of the variable valve timing/lift system on the second cylinder bank.
Common Causes
35%
Broken or open wire in actuator control circuit
30%
Failed rocker arm actuator solenoid with open coil
25%
Disconnected or severely corroded electrical connector
10%
ECM internal driver circuit failure for Bank 2 actuator
Diagnostic Steps
1
Step 1: Locate and inspect Bank 2 'A' rocker arm actuator connector for damage, corrosion, or disconnection
2
Step 2: Measure resistance of actuator solenoid coil (should be 6-12 ohms typically); infinite resistance confirms open circuit
3
Step 3: Check for power supply voltage at actuator connector with key on (should have battery voltage on supply wire)
4
Step 4: Test continuity of control circuit wiring from actuator connector back to ECM
5
Step 5: If wiring and actuator test normal, perform ECM driver circuit test or consider ECM replacement
Estimated Repair Cost
$200 - $850
Parts + labor, varies by vehicle and location
The ECM has detected an open circuit or electrical fault in the control circuit for the 'A' rocker arm actuator on Bank 2. This prevents proper control of the variable valve timing/lift system on the second cylinder bank.
The most common cause of P2655 (A Rocker Arm Actuator Control Circuit/Open Bank 2) is: Broken or open wire in actuator control circuit
Typical repair costs for P2655 range from $200 to $850, depending on the vehicle, location, and whether you do it yourself or go to a shop.
Vehicle remains safe to drive but Bank 2 will operate with fixed valve timing. Expect rough idle, reduced power, and decreased fuel efficiency until repaired.
Start by connecting an OBD2 scanner to read the code and any freeze frame data. Then follow the diagnostic steps specific to P2655 to identify the root cause.
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Quick Info
Category
Powertrain
System
Variable Valve Timing/Lift System
Difficulty
Type
Generic (SAE)
Recommended Tools
OBD2 Scanner
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