What Does P265D Mean?
The PCM has detected an abnormally high voltage signal from the Bank 1 'B' rocker arm actuator position sensor, which monitors variable valve timing or cylinder deactivation mechanisms. This indicates a potential short to voltage in the sensor circuit or a failed sensor.
Common Causes
35%
Shorted rocker arm actuator position sensor or internal sensor failure
30%
Wiring harness short to voltage or damaged insulation near exhaust components
20%
Corroded or damaged electrical connector with moisture intrusion
10%
Failed rocker arm actuator solenoid causing feedback voltage
5%
PCM internal fault or software calibration issue
Diagnostic Steps
1
Step 1: Inspect the rocker arm position sensor connector for corrosion, bent pins, or moisture and clean/repair as needed
2
Step 2: Backprobe the sensor signal wire and verify voltage with key on, engine off (should read approximately 0.5-0.8V reference voltage, not battery voltage)
3
Step 3: Disconnect the sensor and measure resistance between signal wire and ground at the harness side; infinite resistance indicates proper circuit isolation
4
Step 4: If harness tests good, replace the rocker arm actuator position sensor and clear codes, then retest
5
Step 5: If issue persists, inspect wiring routing for chafing against hot or sharp components, particularly near valve covers and exhaust manifolds
Estimated Repair Cost
$150 - $600
Parts + labor, varies by vehicle and location
The PCM has detected an abnormally high voltage signal from the Bank 1 'B' rocker arm actuator position sensor, which monitors variable valve timing or cylinder deactivation mechanisms. This indicates a potential short to voltage in the sensor circuit or a failed sensor.
The most common cause of P265D (B Rocker Arm Actuator Position Sensor Circuit High Bank 1) is: Shorted rocker arm actuator position sensor or internal sensor failure
Typical repair costs for P265D range from $150 to $600, depending on the vehicle, location, and whether you do it yourself or go to a shop.
Vehicle is safe to drive but may experience reduced power, poor fuel economy, and rough idle. Engine performance will be compromised as the PCM operates in failsafe mode.
Start by connecting an OBD2 scanner to read the code and any freeze frame data. Then follow the diagnostic steps specific to P265D to identify the root cause.
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Quick Info
Category
Powertrain
System
Variable Valve Timing / Cylinder Deactivation System
Difficulty
Type
Generic (SAE)
Recommended Tools
OBD2 Scanner
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