What Does P2660 Mean?
The PCM has detected an open circuit or excessive resistance in the control circuit for the Bank 2 'B' rocker arm actuator. This prevents the PCM from commanding the actuator to engage or disengage variable valve timing or cylinder deactivation.
Common Causes
35%
Open circuit in actuator control wiring or broken wire
30%
Failed rocker arm actuator solenoid with open coil winding
20%
Damaged or disconnected electrical connector
10%
Blown fuse or open circuit in power supply to actuator
5%
PCM internal driver circuit failure
Diagnostic Steps
1
Step 1: Inspect the rocker arm actuator connector for secure connection, corrosion, or damaged pins
2
Step 2: Disconnect the actuator and measure resistance across solenoid terminals (typical specification 5-30 ohms); infinite resistance indicates open coil
3
Step 3: Check for power and ground at the actuator connector with key on; should have battery voltage on one pin and PCM-controlled ground on the other
4
Step 4: If actuator tests bad, replace it; if actuator tests good, check wiring continuity from PCM to actuator connector for open circuits
5
Step 5: Verify related fuses and relays in the engine control power distribution circuit are intact
Estimated Repair Cost
$180 - $700
Parts + labor, varies by vehicle and location
The PCM has detected an open circuit or excessive resistance in the control circuit for the Bank 2 'B' rocker arm actuator. This prevents the PCM from commanding the actuator to engage or disengage variable valve timing or cylinder deactivation.
The most common cause of P2660 (B Rocker Arm Actuator Control Circuit/Open Bank 2) is: Open circuit in actuator control wiring or broken wire
Typical repair costs for P2660 range from $180 to $700, depending on the vehicle, location, and whether you do it yourself or go to a shop.
Vehicle remains safe to drive but will operate with reduced performance and fuel economy. The affected bank will run with default valve timing, causing potential rough idle and reduced power.
Start by connecting an OBD2 scanner to read the code and any freeze frame data. Then follow the diagnostic steps specific to P2660 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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