Powertrain
Definition only
Lights the check engine lamp
P2649: A Rocker Arm Actuator Control Circuit High Bank 1
Standardized SAE J2012 code · P26xx — Computer and output circuits
What does P2649 mean?
Voltage on the rocker arm actuator A control line on bank 1 is above the expected window. Typical causes are a short to battery or an open solenoid coil.
The code tells you which monitor failed, not which part is broken. Test before replacing parts.
Common causes
- High Control wire shorted to B+
- Medium Open solenoid coil
- Low Connector pins corroded - high contact resistance
Likelihood is a general estimate across vehicles; your make and model may differ.
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P2649 in the community
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