P264B: Rocker Arm Actuator Position Sensor Circuit Range/Performance Bank 1
The P264B code indicates that the Engine Control Module (ECM) has detected a performance or range issue with the rocker arm actuator position sensor circuit on Bank 1. This sensor monitors the position of the rocker arm actuator, which controls variable valve timing or cylinder deactivation. A fault can cause incorrect valve timing, leading to reduced engine performance, increased emissions, and potential engine damage if not addressed.
01. Most Common Causes
- Faulty rocker arm actuator position sensor
- Wiring or connector issues in the sensor circuit
- Oil sludge or debris affecting actuator movement
- Engine control module (ECM) software or hardware failure
02. Symptoms You Will Notice
- Check Engine Light illuminated
- Rough idle or misfire
- Reduced engine power or hesitation
- Poor fuel economy
03. Step-by-Step Diagnosis
Step 1: Scan for additional codes and freeze frame data
Step 2: Visually inspect wiring and connectors for damage or corrosion
Step 3: Test sensor resistance and voltage with a multimeter
Step 4: Check oil level and condition; perform oil change if necessary
Step 5: Replace sensor if tests indicate failure; clear codes and test drive
04. Commonly Affected Makes
05. Frequently Asked Questions
Is it safe to drive with this code?▼
It is not recommended to drive long distances with this code, as it can cause poor engine performance and potential damage to the valve train. Have it diagnosed promptly.
How much does it cost to fix?▼
Repair costs typically range from $150 to $400, including parts and labor, depending on the cause and vehicle model.