BMW DTC P266A – ‘A’ Rocker Arm Actuator Position Sensor Circuit (Bank 2)
DTC P266A meaning on BMW
DTC P266A indicates a fault with the ‘A’ Rocker Arm Actuator Position Sensor Circuit on Bank 2 in a BMW vehicle. This fault code is specific to the sensor that monitors the position of the rocker arm actuator in the engine’s cylinder head on Bank 2.
BMW DTC P266A symptoms
Symptoms of DTC P266A in a BMW may include rough idling, reduced engine performance, engine misfires, and potentially an illuminated check engine light on the dashboard.
BMW DTC P266A causes
The common causes of DTC P266A on a BMW can include a faulty ‘A’ Rocker Arm Actuator Position Sensor, wiring issues in the sensor circuit, or a problem with the engine control module (ECM).
BMW DTC P266A seriousness
While DTC P266A may not always result in immediate drivability issues, it is important to address this fault code promptly to prevent potential engine damage and ensure optimal performance of the vehicle.
How to diagnose DTC P266A on BMW
To diagnose DTC P266A on a BMW, a mechanic would typically use a diagnostic scanner to retrieve the fault code and then perform a visual inspection of the ‘A’ Rocker Arm Actuator Position Sensor and its wiring. Testing the sensor’s resistance and checking for any loose connections or damaged wires can help pinpoint the issue.
How to fix DTC P266A on BMW
Fixing DTC P266A on a BMW may involve replacing the faulty ‘A’ Rocker Arm Actuator Position Sensor, repairing any damaged wiring in the sensor circuit, or reprogramming the engine control module if necessary. It is recommended to follow the manufacturer’s repair procedures and use genuine BMW parts for a reliable fix.
How to erase DTC P266A on BMW
After addressing the underlying issue causing DTC P266A on a BMW, the fault code can be cleared using a diagnostic scanner. By accessing the vehicle’s ECM and selecting the option to clear fault codes, the DTC P266A should be erased from the system, allowing for a fresh start with no lingering error codes.
Recommended tools & DTC Scanners for BMW
Best Diagnostic App for modern BMWs: BimmerLink
Recommended Bluetooth adapter for Bimmerlink: OBDLink CX
Cable adapter for Bimmerlink: Enet Cable USB Type C
For older BMWs we recommend: Autel AutoLink AL319 (2024 version)
Easy-to-use Multimeter for reliable diagnostics: AstroAI Auto-ranging Multimeter
Some of the links on this page may be affiliate links, which means we may earn a small commission if you make a purchase. This helps us keep our DTC database up to date and provide valuable content for free. We only recommend products that we have tested and believe to be the best in their class.