What Does P2663 Mean?
The PCM has detected abnormally low voltage in the Bank 2 'B' rocker arm actuator control circuit. This indicates a short to ground in the wiring or a problem with the actuator solenoid coil.
Common Causes
35%
Wiring harness short to ground or damaged insulation
30%
Failed rocker arm actuator solenoid with internal short to ground
20%
Damaged or corroded connector causing short circuit
10%
Water intrusion or oil contamination in connector creating ground path
5%
PCM internal driver circuit shorted to ground
Diagnostic Steps
1
Step 1: Disconnect the rocker arm actuator connector and check for oil or coolant contamination that could cause a short
2
Step 2: Measure resistance from actuator control wire to ground at the harness side with actuator disconnected; should read infinite resistance
3
Step 3: Measure resistance across actuator solenoid terminals (typical 5-30 ohms); also check resistance from each terminal to solenoid housing (should be infinite)
4
Step 4: Inspect wiring harness routing for chafing points where wire insulation may be damaged, particularly near sharp edges or hot components
5
Step 5: If wiring and actuator test good, suspect PCM driver circuit failure; verify by checking for short on PCM side with all actuators disconnected
Estimated Repair Cost
$150 - $650
Parts + labor, varies by vehicle and location
The PCM has detected abnormally low voltage in the Bank 2 'B' rocker arm actuator control circuit. This indicates a short to ground in the wiring or a problem with the actuator solenoid coil.
The most common cause of P2663 (B Rocker Arm Actuator Control Circuit Low Bank 2) is: Wiring harness short to ground or damaged insulation
Typical repair costs for P2663 range from $150 to $650, depending on the vehicle, location, and whether you do it yourself or go to a shop.
Vehicle is safe to drive but will experience reduced performance and fuel economy. The PCM will disable the affected actuator to prevent damage to control circuits.
Start by connecting an OBD2 scanner to read the code and any freeze frame data. Then follow the diagnostic steps specific to P2663 to identify the root cause.
OBDHut Mobile App
Scan codes directly from your car with the OBDHut app.
Coming Soon
Quick Info
Category
Powertrain
System
Variable Valve Timing / Cylinder Deactivation System
Difficulty
Type
Generic (SAE)
Recommended Tools
OBD2 Scanner
A quality scan tool helps you read codes, view live data, and clear faults.
