OBD II Fault Code

  • OBD II P2648

OBD-II Code Decreased engine performance is defined as a "A" Rocker Arm Actuator Control Circuit Low

The Rocker Arm Control Solenoid supplies hydraulic pressure to the Variable Timing mechanism. This allows the Variable Timing System to adjust valve timing as needed. When the engine's control module (PCM) does not see the correct voltage signal back from the Rocker Arm Control Solenoid, the PCM will set code P2648.

Decreased engine performance Symptoms

  • Decreased engine performance
  • Increased fuel consumption

Common Problems That Trigger the P2648 Code

  • Engine oil level is too low
  • Powertrain Control Module (PCM) failure
  • Rocker arm oil pressure sensor failure
  • Wiring issue
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