AutoCodes – Generic – P2648

P2648 Code - 'A' Rocker Arm Actuator Control Circuit Low Bank 1

Quick Answer

The Engine Control Module (ECM) commands the Rocker Arm Actuator to control the oil hydraulic circuit. Common causes include Low or overfilled engine oil, Incorrect engine oil type, Faulty 'A' Rocker Arm Actuator. 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: P2648 indicates 'A' Rocker Arm Actuator Control Circuit Low Bank 1.
Common causes: Common causes include Low or overfilled engine oil, Incorrect engine oil type, Faulty 'A' Rocker Arm Actuator.
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.

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Code Popularity 15,265

How popular is this code, among other codes? Low

Repair Importance Level

Urgent (Diagnose now) (3 / 3)

Repair Difficulty Level

Advanced (Pro) (3 / 3)

What is this?

Table of contents Created and updated by William Orellana on Jan 24, 2019

Description
Possible Causes
How To Fix
Cost to Diagnose
Comments
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Code P2648 Description

The Engine Control Module (ECM) commands the Rocker Arm Actuator to control the oil hydraulic circuit. Oil flows through the Rocker Arm Actuator to the variable valve timing system to adjust the engine's valve timing. The variable valve timing (VVT) system is used to improve engine's performance, fuel economy or emissions. The ECM monitors the Rocker Arm Actuator circuit and sets the OBDII when the 'A' Rocker Arm Actuator circuit is out of factory specifications.

OBDII Code P2648 - 'A' Rocker Arm Actuator Control Circuit Low Bank 1 - AutoCodes.com — P2648 Code - 'A' Rocker Arm Actuator Control Circuit Low Bank 1

What does this mean?

What are the Possible Causes of the DTC P2648?

Low or overfilled engine oil
Incorrect engine oil type
Faulty 'A' Rocker Arm Actuator
'A' Rocker Arm Actuator harness is open or shorted
'A' Rocker Arm Actuator circuit poor electrical connection

How to Fix the DTC P2648?

Review the 'Possible Causes' above and visually examine the corresponding wiring harness and connectors. Check for damaged components and inspect connector pins for signs of being broken, bent, pushed out, or corroded.

What is the Cost to Diagnose the Code?

Labor: 1.0

To diagnose the P2648 code, it typically requires 1.0 hour of labor. Rates vary by location, vehicle, and shop. Many shops charge between $80–$150 per hour; dealerships and metro areas may be higher, independents may be lower.

Need more information about the P2648 code?

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Information for Specific Makes

P2648 Acura — Rocker Arm Oil Control Solenoid Circuit Low Voltage
P2648 Buick — Intake Rocker Arm Solenoid Valve 1 Control Circuit
P2648 Cadillac — Intake Rocker Arm Solenoid Valve 1 Control Circuit
P2648 Chevrolet — Intake Rocker Arm Solenoid Valve 1 Control Circuit
P2648 Dodge — 'A' Rocker Arm Actuator Control Circuit Low Bank 1
P2648 GMC — Intake Rocker Arm Solenoid Valve 1 Control Circuit
P2648 Honda — Rocker Arm Oil Control Solenoid Circuit Low 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.