What Does P2664 Mean?
The PCM has detected abnormally high voltage in the Bank 2 'B' rocker arm actuator control circuit. This indicates an open in the ground circuit, short to voltage in the wiring, or a problem with the PCM driver circuit.
Common Causes
30%
Open ground circuit or broken ground wire to actuator
25%
Wiring harness short to voltage or damaged insulation near power sources
20%
Failed rocker arm actuator solenoid with open coil or internal fault
15%
Damaged connector with backed-out or corroded ground terminal
10%
PCM internal driver circuit failure or open circuit
Diagnostic Steps
1
Step 1: Inspect actuator connector for pushed-out pins, corrosion, or loose connections on both power and ground sides
2
Step 2: With connector attached and key on, backprobe the control circuit; should see battery voltage until PCM commands actuator on
3
Step 3: Disconnect actuator and measure resistance across solenoid terminals (typical 5-30 ohms); infinite resistance indicates open coil
4
Step 4: Check ground circuit continuity from actuator connector ground pin to battery negative; should be less than 1 ohm resistance
5
Step 5: If actuator and wiring test good, perform voltage drop test on ground circuit while commanding actuator on; excessive drop indicates poor ground connection
Estimated Repair Cost
$140 - $700
Parts + labor, varies by vehicle and location
The PCM has detected abnormally high voltage in the Bank 2 'B' rocker arm actuator control circuit. This indicates an open in the ground circuit, short to voltage in the wiring, or a problem with the PCM driver circuit.
The most common cause of P2664 (B Rocker Arm Actuator Control Circuit High Bank 2) is: Open ground circuit or broken ground wire to actuator
Typical repair costs for P2664 range from $140 to $700, depending on the vehicle, location, and whether you do it yourself or go to a shop.
Safe to operate but with reduced engine performance and fuel economy. The PCM will operate in failsafe mode with fixed valve timing on the affected bank.
Start by connecting an OBD2 scanner to read the code and any freeze frame data. Then follow the diagnostic steps specific to P2664 to identify the root cause.
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Quick Info
Category
Powertrain
System
Variable Valve Timing / Cylinder Deactivation System
Difficulty
Type
Generic (SAE)
Recommended Tools
OBD2 Scanner
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