Powertrain, generic (extended)

P267C "B" Rocker Arm Actuator Position Sensor Circuit Low (Bank 2)

Check engine lightOn
EmissionsRelevant
Drive cycleNot required
Limp modePossible

With P267C the engine controller reads the bank 2 position signal of lift actuator B below its lowest valid value. A sensor of this kind is designed so that even the end stop of the shaft keeps a margin to zero volts, so a reading near ground points to an electrical cause: the signal line shorted to chassis, a lost 5 V reference, or a sensor with an internal short. No manufacturer documents P267C publicly, and no thresholds are published. CARB treats out-of-range low inputs of variable lift systems as faults that must be detected. On a V engine the controller then usually stops adjusting lift on bank 2 only. Check the reference voltage at the sensor plug before replacing parts. P267D is the high-side counterpart.

Likely causes

Signal wire shorted to ground through damaged insulation
5 V reference supply to the sensor missing
Internal short in position sensor B, bank 2

Symptoms

  • Check engine light on
  • Lift on bank 2 fixed at a default position
  • Noticeably weaker acceleration

Repair estimate

DifficultyHardWorkshop job
Parts and labour€80–1,200
Time0.5–4 h

Typical range across vehicles; the real cost depends on what the testing finds.

Parts involved

rocker arm position sensor b b2wiring harness

Related codes

P267AP267DP267BP265CP266C

References: law.cornell.edu, en.wikipedia.org.