P265C: B Rocker Arm Actuator Position Sensor Circuit Low Bank 1
The P265C code indicates that the powertrain control module (PCM) has detected a low voltage signal from the rocker arm actuator position sensor on Bank 1, which is used to monitor the position of the rocker arm actuator for variable valve timing or cylinder deactivation systems. This low circuit condition can be caused by a faulty sensor, wiring issues, or a malfunctioning actuator, potentially leading to reduced engine performance, increased emissions, and possible drivability concerns.
01. Most Common Causes
- Faulty rocker arm actuator position sensor
- Short to ground in sensor circuit wiring
- Damaged connector or poor electrical connection
- Failed rocker arm actuator assembly
02. Symptoms You Will Notice
- Check Engine Light illuminated
- Reduced engine power or performance
- Rough idle or misfire
- Decreased fuel economy
03. Step-by-Step Diagnosis
Step 1: Scan for additional codes and freeze frame data to identify related issues.
Step 2: Visually inspect the rocker arm actuator position sensor and wiring for damage, corrosion, or loose connections.
Step 3: Use a multimeter to test the sensor's voltage reference, ground, and signal circuits against manufacturer specifications.
Step 4: If circuits are okay, replace the rocker arm actuator position sensor and clear the code.
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 reduced engine performance 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 diagnosis and sensor replacement, but may vary depending on labor rates and parts.