Lift systems that move the rocker geometry with an electric motor, such as Toyota Valvematic, need a sensor that tells the engine controller the actual adjustment angle. P265A flags a general electrical problem with the feedback sensor that reports where actuator B on bank 1 sits: the controller sees no usable signal but cannot classify it as simply too low or too high. Toyota's own bulletins place a Valvematic feedback complaint under the neighbouring B sensor code P265B, which shows Toyota uses this sensor letter; P265A itself is not documented publicly by any manufacturer. CARB requires circuit checks on all inputs of a valve lift system. A loose connector, a broken reference or ground wire, or a sensor failure are the likely reasons; P265B to P265E narrow the fault down.
Medium severity. Can I keep driving?If the car is running normally, drive in moderation to a repair shop. If it loses power or another warning appears, do not continue.
Bank 1 is the side of the engine with cylinder 1. Inline engines only have this bank.
Symptoms
- MIL on
- Lift held at a fixed value, sluggish response
- Higher fuel consumption
Most likely causes
- Loose or corroded connector at the B position sensor
- Open 5 V reference or sensor ground wire
- Failed position sensor inside the lift controller
What to check, in order
Start with the simplest. You can tick off each step.
Good to know
- Repair difficulty: hard
- It can trigger limp mode.
- It affects emissions.
What each character of P265A means
- P: Powertrain: engine and transmission
- 2: Generic code: same on every make
- 6: Control modules and outputs
- 5A: Specific fault in that system
Frequently asked questions
Can I keep driving with code P265A?
If the car is running normally, drive in moderation to a repair shop. If it loses power or another warning appears, do not continue.
What causes code P265A?
The most common causes are: loose or corroded connector at the B position sensor; open 5 V reference or sensor ground wire; failed position sensor inside the lift controller.
Related codes
- P265B"B" Rocker Arm Actuator Position Sensor Circuit Range/Performance (Bank 1)
- P265C"B" Rocker Arm Actuator Position Sensor Circuit Low (Bank 1)
- P265D"B" Rocker Arm Actuator Position Sensor Circuit High (Bank 1)
- P265E"B" Rocker Arm Actuator Position Sensor Circuit Intermittent/Erratic (Bank 1)
- P264A"A" Rocker Arm Actuator Position Sensor Circuit (Bank 1)
- P2650"B" Rocker Arm Actuator Control Circuit/Open (Bank 1)
Sources
Values and procedures vary by manufacturer. If it affects brakes, steering, fuel or high voltage, see a professional. Updated: 2026-11-04. How we build these pages.