B Rocker Arm Actuator Position Sensor Circuit High Bank 1
The P265D code indicates that the Engine Control Module (ECM) has detected a voltage signal from the B rocker arm actuator position sensor on Bank 1 that is higher than the expected range. This sensor monitors the position of the rocker arm actuator, which controls variable valve timing or cylinder deactivation. A high circuit condition typically points to a short to voltage, a faulty sensor, or wiring issues. This can affect engine performance, fuel economy, and emissions.
01. Most Common Causes
- Faulty B rocker arm actuator position sensor
- Short to voltage in the sensor circuit
- Damaged wiring or connector
- ECM software or hardware issue
02. Symptoms You Will Notice
- Check Engine Light illuminated
- Reduced engine performance or power
- Poor fuel economy
- Rough idle or misfire
03. Step-by-Step Diagnosis
Step 1: Use an OBD2 scanner to confirm the code and check for additional codes.
Step 2: Visually inspect the sensor wiring and connector for damage, corrosion, or shorts.
Step 3: Test the sensor voltage and ground circuits with a multimeter; compare to manufacturer specs.
Step 4: If circuits are okay, replace the B rocker arm actuator position sensor.
04. Commonly Affected Makes
05. Frequently Asked Questions
Is it safe to drive with this code?▼
It is not recommended to drive long distances as it can cause engine performance issues and potential damage to the variable valve timing system.
How much does it cost to fix?▼
The cost typically ranges from $50 to $150 for parts and labor, depending on the vehicle and shop rates.