Powertrain, generic (extended)

P2662 "B" Rocker Arm Actuator System Stuck On (Bank 2)

Check engine lightOn
EmissionsRelevant
Drive cycleRequired
Limp modePossible

With P2662 the controller concludes that stage B on bank 2 stays switched after it has requested the default mode. Detection depends on the design: a pressure switch that keeps indicating oil pressure, or engine behaviour on that bank that still matches the engaged state. A solenoid that seeps oil when closed, a return path that cannot drain, or locking pins jammed by debris or wear keep the rockers coupled. Because only one bank is affected, the engine may idle unevenly or misfire on that side, especially when cold. No manufacturer documents P2662 publicly; Honda's published stuck-on case for stage B (P2652) refers to bank 1. CARB requires such stuck conditions in valve lift systems to be detected. Opposite fault on this bank: P2661.

Likely causes

Bank 2 solenoid B seeping oil when closed
Blocked drain path keeping oil pressure on the rockers
Locking pins jammed in the coupled position by debris or wear

Symptoms

  • MIL on
  • Uneven idle or misfire on bank 2, worse when cold

Repair estimate

DifficultyMediumDIY possible
Parts and labour€50–900
Time0.5–4 h

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

Parts involved

rocker arm actuator b b2oil control valve

Related codes

P2661P2660P2652P2657

References: law.cornell.edu, en.wikipedia.org, static.nhtsa.gov.