What Does P266D Mean?
The rocker arm actuator position sensor on Bank 2 is reporting a voltage signal above the expected maximum threshold. This indicates a potential open circuit, short to voltage, or sensor malfunction. High voltage prevents proper monitoring of variable valve timing operation.
Common Causes
30%
Open circuit in sensor signal or ground wire
30%
Faulty rocker arm actuator position sensor
20%
Short to voltage in sensor signal circuit
15%
Corroded or damaged electrical connector causing high resistance
5%
Failed Engine Control Module (ECM)
Diagnostic Steps
1
Step 1: Inspect Bank 2 rocker arm actuator position sensor connector and wiring for damage, corrosion, or pin back-out
2
Step 2: With sensor disconnected and ignition on, measure voltage on signal wire at ECM-side connector; should read near reference voltage (5V)
3
Step 3: Check for continuity between sensor ground terminal and chassis ground
4
Step 4: Test sensor by applying reference voltage and measuring output signal; compare to specifications
5
Step 5: If wiring and connections test normal, replace position sensor and verify repair
Estimated Repair Cost
$150 - $600
Parts + labor, varies by vehicle and location
The rocker arm actuator position sensor on Bank 2 is reporting a voltage signal above the expected maximum threshold. This indicates a potential open circuit, short to voltage, or sensor malfunction. High voltage prevents proper monitoring of variable valve timing operation.
The most common cause of P266D (A Rocker Arm Actuator Position Sensor Circuit High Bank 2) is: Open circuit in sensor signal or ground wire
Typical repair costs for P266D range from $150 to $600, depending on the vehicle, location, and whether you do it yourself or go to a shop.
Vehicle can typically be driven but may exhibit reduced power, poor fuel economy, and rough running. Extended driving with this fault may lead to engine damage.
Start by connecting an OBD2 scanner to read the code and any freeze frame data. Then follow the diagnostic steps specific to P266D 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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