Error code

OBD2 P2649

OBD2P2649
Diagnostic Trouble Code· Standard OBD-II fault code read from the vehicle's onboard diagnostics.

What it means

'A' Rocker Arm Actuator Control Circuit High.

Severity

moderateCan drive with reduced performance; however, it is recommended to address the issue promptly.

Summary

P2649 indicates an abnormally high voltage or current in the control circuit of the rocker arm actuator for variable valve timing on bank 1 (typically the intake camshaft) of V-type engines, specifically affecting Honda vehicles with VTEC systems.

Symptoms

  • Stored trouble code and illuminated CHECK ENGINE light
  • Multiple other codes related to misfires may be present
  • Varying degrees of power loss
  • Engine running roughly at certain engine speeds
  • Engine not idling or stalling unexpectedly at low speeds
  • Increased fuel consumption

Common Causes

  • Damaged, burnt, shorted, disconnected, or corroded wiring and/or connectors in the VTEC oil control solenoid’s control circuit(s)
  • Defective or malfunctioning VTEC oil control solenoid
  • Dirty, degraded, contaminated, and/or unsuitable oil causing the solenoid shuttle to stick
  • Mechanical failure of the rocker arm locking mechanism (rare but possible)

Diagnosis

  1. Inspect and test wiring and connectors in the VTEC oil control solenoid’s circuit(s)
  2. Check for any signs of damage or corrosion on the rocker arm actuator
  3. Verify that engine oil is clean and suitable for use with VTEC systems

Fixes

  • Repair or replace damaged wiring, connectors, or faulty solenoid

FAQ

What does P2649 mean?

P2649 indicates an issue with the rocker arm actuator control circuit on bank 1 of a VTEC system, leading to high voltage or current.

How do I fix P2649?

Fixing P2649 typically involves repairing damaged wiring and connectors or replacing the faulty rocker arm actuator control solenoid.

View source

Not affiliated with OBD2. Answer summarized from the manufacturer's manual linked above; consult that source for the authoritative procedure.

More OBD2 codes

All OBD2 codes →Search more codes →