What it means
The position sensor that confirms the A rocker arm switching state on bank 2 returns no usable signal.
At a glance
- Usually lights the check-engine light
How it works
The A rocker arm actuator position sensor on bank 2 reports whether that bank's valve-lift mechanism has reached its commanded position. This code sets when the module cannot use the sensor signal, commonly because the sensor element is open or its connector is corroded.
Common causes
Most likely first.
- Open sensor element
- Corroded sensor connector
Symptoms
- Check-engine light
- Reduced engine power or performance
How to diagnose it
- Record freeze-frame data and use live data to check whether the A rocker arm position reading for bank 2 is missing or invalid.
- Locate the A rocker arm actuator and position sensor on bank 2 using vehicle service information, then inspect the connector for corrosion, looseness, or damaged pins.
- Inspect the bank 2 sensor wiring for breaks, abrasion, or damage near the rocker cover and engine heat sources.
- Check the sensor supply, ground, and signal circuit at the connector against the manufacturer's specification.
- If wiring and connector checks pass, test the bank 2 A position sensor and actuator operation using the manufacturer's procedure.
Common fixes
- Clean and secure the corroded or loose bank 2 A sensor connector, repairing damaged terminals as needed.
- Repair an open or damaged wire in the bank 2 A position sensor circuit.
- Replace the bank 2 A rocker arm position sensor if its circuit tests confirm an open sensor element.
Can I keep driving?
You may be able to drive gently if the engine runs smoothly, but reduced power or poor performance can make merging and passing unsafe. Avoid hard acceleration and arrange diagnosis soon.
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.