What Does P264E Mean?
The position sensor for the 'A' rocker arm actuator on Bank 1 is sending erratic or intermittent signals to the ECM. This indicates either a failing sensor, poor electrical connection, or mechanical issues with the variable valve timing/lift mechanism.
Common Causes
35%
Corroded or loose electrical connector at rocker arm actuator position sensor
30%
Failing rocker arm actuator position sensor
20%
Damaged or chafed wiring between ECM and position sensor
15%
Mechanical wear or binding in rocker arm actuator assembly causing erratic feedback
Diagnostic Steps
1
Step 1: Inspect the rocker arm actuator position sensor connector for corrosion, oil intrusion, or loose pins and clean/repair as needed
2
Step 2: Check wiring harness from sensor to ECM for chafing, breaks, or shorts using a multimeter
3
Step 3: Monitor live data for position sensor voltage while engine runs to confirm intermittent signal dropout
4
Step 4: Remove valve cover and inspect rocker arm actuator for mechanical binding, sludge buildup, or physical damage
5
Step 5: Replace position sensor if electrical connections are intact and mechanical operation is smooth but signal remains erratic
Estimated Repair Cost
$150 - $600
Parts + labor, varies by vehicle and location
The position sensor for the 'A' rocker arm actuator on Bank 1 is sending erratic or intermittent signals to the ECM. This indicates either a failing sensor, poor electrical connection, or mechanical issues with the variable valve timing/lift mechanism.
The most common cause of P264E (A Rocker Arm Actuator Position Sensor Circuit Intermittent/Erratic Bank 1) is: Corroded or loose electrical connector at rocker arm actuator position sensor
Typical repair costs for P264E range from $150 to $600, depending on the vehicle, location, and whether you do it yourself or go to a shop.
Vehicle remains drivable but may experience reduced power, poor fuel economy, and rough idle. Not immediately dangerous but should be repaired promptly to prevent engine damage.
Start by connecting an OBD2 scanner to read the code and any freeze frame data. Then follow the diagnostic steps specific to P264E to identify the root cause.
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Quick Info
Category
Powertrain
System
Variable Valve Timing/Lift System
Difficulty
Type
Generic (SAE)
Recommended Tools
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