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Engine-Codes – Generic – P2649

P2649 Code - 'A' Rocker Arm Actuator Control Circuit High Bank 1

Quick Answer

The diagnostic trouble code P2649 indicates a problem with the 'A' Rocker Arm Actuator Control Circuit High Bank 1 in the vehicle's engine. Common causes include Faulty rocker arm actuator, Wiring issues or shorts in the control circuit, Malfunctioning engine control module (ECM). Severity is High - diagnose this code as soon as possible. Driving is not recommended if the warning light is flashing, the engine runs poorly, or safety-related symptoms are present.

What it means
P2649 indicates 'A' Rocker Arm Actuator Control Circuit High Bank 1.
Common causes
Common causes include Faulty rocker arm actuator, Wiring issues or shorts in the control circuit, Malfunctioning engine control module (ECM).
Severity
High - diagnose this code as soon as possible.
Can I drive?
Driving is not recommended if the warning light is flashing, the engine runs poorly, or safety-related symptoms are present.
What is this?
Table of contents Created and updated by William Orellana on Sep 09, 2024
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Code P2649 Description

The diagnostic trouble code P2649 indicates a problem with the 'A' Rocker Arm Actuator Control Circuit High Bank 1 in the vehicle's engine. This code is commonly found in vehicles equipped with variable valve timing (VVT) systems, which help optimize engine performance and efficiency by adjusting the timing of the opening and closing of the engine's valves.

OBDII Code P2649 - 'A' Rocker Arm Actuator Control Circuit High Bank 1
P2649 Code - 'A' Rocker Arm Actuator Control Circuit High Bank 1

Common Causes of P2649

  1. Faulty rocker arm actuator
  2. Wiring issues or shorts in the control circuit
  3. Malfunctioning engine control module (ECM)
  4. Poor electrical connections
  5. Engine oil sludge or debris affecting actuator operation

Symptoms of P2649

  1. Engine misfires
  2. Rough idling
  3. Decreased fuel efficiency
  4. Loss of power
  5. Illumination of the check engine light

How to Fix P2649

  1. Diagnose the issue by using a scan tool to confirm the presence of the P2649 code and identify the specific cause of the high voltage condition.
  2. Inspect the rocker arm actuator and control circuit for any visible damage or signs of wear. Replace any faulty components as needed.
  3. Check the wiring harness and connectors for any loose connections, corrosion, or damage. Repair or replace any damaged wiring.
  4. Clear the trouble code from the ECM memory and test drive the vehicle to verify that the issue has been resolved.
  5. If the code persists, further diagnostics may be required to pinpoint the exact cause of the high voltage condition, such as testing the ECM or performing more in-depth electrical tests.

Cost to Fix P2649

The cost of repairing the 'A' Rocker Arm Actuator Control Circuit High Bank 1 issue can vary depending on the specific cause of the problem and the make and model of the vehicle. In general, the cost of parts for this repair can range from $100 to $300, while labor costs can add an additional $100 to $200. Overall, the total repair cost for addressing this code typically falls within the range of $200 to $500.

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Code P2649 Information for Specific Makes

  • P2649 Acura — Rocker Arm Oil Control Solenoid Circuit High Voltage
  • P2649 Buick — Intake Rocker Arm Solenoid Valve 1 Control Circuit High Voltage
  • P2649 Cadillac — Intake Rocker Arm Solenoid Valve 1 Control Circuit High Voltage
  • P2649 Chevrolet — Intake Rocker Arm Solenoid Valve 1 Control Circuit High Voltage
  • P2649 Dodge — 'A' Rocker Arm Actuator Control Circuit High Bank 1
  • P2649 GMC — Intake Rocker Arm Solenoid Valve 1 Control Circuit High Voltage
  • P2649 Honda — Rocker Arm Oil Control Solenoid Circuit High Voltage
About the author: William Orellana is a Master Mechanic and Mechanical Engineer with over 30 years of experience diagnosing and repairing vehicles. Learn more about his background.

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