What Does P264B Mean?
The rocker arm actuator position sensor signal on Bank 1 is outside the expected range for the commanded position. The sensor is functioning but reporting incorrect or implausible position data.
Common Causes
35%
Mechanical binding or sticking of rocker arm actuator preventing proper movement
25%
Position sensor misalignment or calibration drift
20%
Low engine oil level or pressure affecting actuator operation
15%
Failing position sensor providing inaccurate readings
5%
Intermittent wiring or connector issues causing signal noise
Diagnostic Steps
1
Step 1: Check engine oil level and condition; verify oil pressure meets specifications
2
Step 2: Monitor position sensor values with scan tool while commanding actuator on/off; compare to specifications
3
Step 3: Remove valve cover and inspect actuator for mechanical freedom and proper movement
4
Step 4: Check for oil sludge or debris restricting actuator movement; clean if necessary
5
Step 5: Replace actuator assembly if mechanically binding or sensor readings remain out of range
Estimated Repair Cost
$300 - $1,200
Parts + labor, varies by vehicle and location
The rocker arm actuator position sensor signal on Bank 1 is outside the expected range for the commanded position. The sensor is functioning but reporting incorrect or implausible position data.
The most common cause of P264B (A Rocker Arm Actuator Position Sensor Circuit Range/Performance Bank 1) is: Mechanical binding or sticking of rocker arm actuator preventing proper movement
Typical repair costs for P264B range from $300 to $1,200, depending on the vehicle, location, and whether you do it yourself or go to a shop.
Safe to drive with reduced performance. Engine may run rough or lack power due to incorrect valve timing operation.
Start by connecting an OBD2 scanner to read the code and any freeze frame data. Then follow the diagnostic steps specific to P264B to identify the root cause.
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Quick Info
Category
Powertrain
System
Variable Valve Timing System
Difficulty
Type
Generic (SAE)
Recommended Tools
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