What Does P265E Mean?
The PCM is receiving an unstable or erratic signal from the Bank 1 'B' rocker arm actuator position sensor, indicating the sensor output is fluctuating outside expected parameters. This typically points to a loose connection, intermittent wiring fault, or failing sensor.
Common Causes
40%
Loose or corroded electrical connector with intermittent contact
30%
Damaged or chafed wiring harness with intermittent short or open circuit
20%
Failing rocker arm actuator position sensor with internal intermittent fault
7%
Poor ground connection or corroded ground circuit
3%
Mechanical rocker arm actuator binding causing erratic sensor readings
Diagnostic Steps
1
Step 1: Wiggle test all connectors and wiring to the sensor while monitoring live data to reproduce the intermittent fault
2
Step 2: Inspect connector terminals for looseness, corrosion, or spread pins; repair or replace connector as needed
3
Step 3: Check sensor signal voltage with engine running at various RPMs; signal should be steady and change smoothly with actuator movement
4
Step 4: Inspect wiring harness routing for contact points with moving components or heat sources that could cause intermittent damage
5
Step 5: If no wiring issues found, replace the rocker arm position sensor and verify proper actuator mechanical operation
Estimated Repair Cost
$120 - $550
Parts + labor, varies by vehicle and location
The PCM is receiving an unstable or erratic signal from the Bank 1 'B' rocker arm actuator position sensor, indicating the sensor output is fluctuating outside expected parameters. This typically points to a loose connection, intermittent wiring fault, or failing sensor.
The most common cause of P265E (B Rocker Arm Actuator Position Sensor Circuit Intermittent/Erratic Bank 1) is: Loose or corroded electrical connector with intermittent contact
Typical repair costs for P265E range from $120 to $550, depending on the vehicle, location, and whether you do it yourself or go to a shop.
Safe to drive but may cause intermittent power loss, hesitation, or rough running when fault occurs. Extended operation may result in catalyst damage due to incorrect valve timing.
Start by connecting an OBD2 scanner to read the code and any freeze frame data. Then follow the diagnostic steps specific to P265E 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
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