What it means
Voltage on the rocker arm actuator B control line on bank 2 is above the expected window. Typical causes are a short to battery or an open solenoid coil.
At a glance
- Usually lights the check-engine light
How it works
The control module monitors and drives the B rocker arm actuator circuit on bank 2. This code sets when the monitored control-line voltage is higher than expected, which can happen if the wire is shorted to battery voltage or the actuator coil is open.
Common causes
Most likely first.
- Control wire shorted to B+
- Open solenoid coil
- Connector pins corroded - high contact resistance
Symptoms
- Check-engine light
How to diagnose it
- Record freeze-frame data and check for other bank 2 rocker-arm actuator codes that may point to a shared wiring issue.
- Inspect the bank 2 B actuator connector and harness for damage, corrosion, loose pins, or contact with a battery-voltage wire.
- Disconnect the actuator as specified and check its coil for an open circuit against the manufacturer's specification.
- Test the control wire for a short to battery voltage and verify continuity through the circuit.
- If the actuator and wiring test correctly, check the module connector and output using the manufacturer's diagnostic procedure.
Common fixes
- Repair a loose, corroded, or damaged connector at the bank 2 B actuator.
- Repair wiring shorted to battery voltage or an open in the control circuit.
- Replace the bank 2 B actuator if its coil is open.
- Repair a confirmed module connector or driver fault.
Can I keep driving?
If the engine runs normally, keep driving limited until the circuit is repaired because the bank 2 actuator may not respond to commands. Avoid hard acceleration and stop if rough running or loss of power becomes significant.
A code shows where the control module detected a fault, not always which part failed. Check the causes in order and confirm with a test before replacing parts. Have several codes? Check them together
This is a generic code: it means the same on every make. The car’s maker may add more detail in its own service information.