What Does P264A Mean?
The rocker arm actuator position sensor circuit on Bank 1 has a malfunction preventing the PCM from accurately monitoring actuator position. This sensor provides feedback to verify the actuator is functioning correctly.
Common Causes
40%
Failed position sensor integrated into rocker arm actuator assembly
30%
Damaged wiring or connector in position sensor circuit
15%
Corroded or loose sensor connector terminals
10%
Engine oil contamination affecting Hall effect or inductive sensor
5%
PCM sensor input circuit failure
Diagnostic Steps
1
Step 1: Inspect position sensor connector for corrosion, oil contamination, or damaged pins
2
Step 2: Check sensor reference voltage at connector (typically 5V); verify ground circuit continuity
3
Step 3: Monitor position sensor signal voltage with scan tool while manually moving actuator (if accessible)
4
Step 4: Check sensor signal wire for shorts to power, ground, or other circuits using multimeter
5
Step 5: Replace rocker arm actuator assembly if sensor is integral and testing confirms sensor failure
Estimated Repair Cost
$250 - $1,000
Parts + labor, varies by vehicle and location
The rocker arm actuator position sensor circuit on Bank 1 has a malfunction preventing the PCM from accurately monitoring actuator position. This sensor provides feedback to verify the actuator is functioning correctly.
The most common cause of P264A (A Rocker Arm Actuator Position Sensor Circuit Bank 1) is: Failed position sensor integrated into rocker arm actuator assembly
Typical repair costs for P264A range from $250 to $1,000, depending on the vehicle, location, and whether you do it yourself or go to a shop.
Safe to drive but engine performance and fuel economy will be compromised. PCM cannot verify proper VVT operation.
Start by connecting an OBD2 scanner to read the code and any freeze frame data. Then follow the diagnostic steps specific to P264A 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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