What Does P2649 Mean?
The PCM has detected abnormally high voltage in the rocker arm actuator control circuit for Bank 1. This electrical fault prevents the module from properly controlling the actuator.
Common Causes
35%
Wiring short to voltage (battery or charging system) in actuator circuit
25%
Open circuit in actuator ground or control wire
20%
Failed rocker arm actuator solenoid with internal open circuit
15%
Damaged or corroded actuator connector causing high resistance
5%
PCM driver circuit stuck high or internal failure
Diagnostic Steps
1
Step 1: Disconnect actuator connector and check for voltage at harness side with key on (should be 0V when not commanded)
2
Step 2: Check for continuity between actuator ground circuit and chassis ground
3
Step 3: Inspect wiring harness for damage or contact with hot components causing short to voltage
4
Step 4: Measure actuator solenoid resistance; replace if open circuit (infinite resistance) detected
5
Step 5: Monitor actuator command signal with scan tool while checking voltage at connector
Estimated Repair Cost
$150 - $850
Parts + labor, varies by vehicle and location
The PCM has detected abnormally high voltage in the rocker arm actuator control circuit for Bank 1. This electrical fault prevents the module from properly controlling the actuator.
The most common cause of P2649 (A Rocker Arm Actuator Control Circuit High Bank 1) is: Wiring short to voltage (battery or charging system) in actuator circuit
Typical repair costs for P2649 range from $150 to $850, depending on the vehicle, location, and whether you do it yourself or go to a shop.
Safe to drive with reduced engine performance. Vehicle will operate in limp mode with fixed valve timing.
Start by connecting an OBD2 scanner to read the code and any freeze frame data. Then follow the diagnostic steps specific to P2649 to identify the root cause.
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Quick Info
Category
Powertrain
System
Variable Valve Timing System
Difficulty
Type
Generic (SAE)
Recommended Tools
OBD2 Scanner
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