AutoCodes – Honda – P2647 2009 Honda Accord

P2647 2009 Honda Accord Code - Rocker Arm Oil Pressure Switch Circuit High Voltage

Quick Answer

The Variable Valve Timing and Lift Electronic Control (VTEC) system activates the Rocker Arm Oil Control Solenoid (VTEC Solenoid Valve) by command from the Engine Control Module (ECM) / Powertrain Control Module (PCM), and it charges/discharges the hydraulic circuit of the VTEC mechanism that switches valve timing between Low and High. Common causes include Check engine oil level, oil condition and pressure, Faulty Variable Valve Timing and Lift Electronic Control (VTEC) / Rocker Arm Oil Pressure Switch, VTEC/Rocker Arm Oil Pressure Switch harness is open or shorted. 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: P2647 2009 Honda Accord indicates Rocker Arm Oil Pressure Switch Circuit High Voltage.
Common causes: Common causes include Check engine oil level, oil condition and pressure, Faulty Variable Valve Timing and Lift Electronic Control (VTEC) / Rocker Arm Oil Pressure Switch, VTEC/Rocker Arm Oil Pressure Switch harness is open or shorted.
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 8,503

How popular is this code, among other codes? Low

Repair Importance Level

Urgent (Diagnose now) (3 / 3)

Repair Difficulty Level

Advanced (Pro) (3 / 3)

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

Description
Step-by-Step Diagnostic Guide
Possible Causes
How To Fix
Cost to Diagnose
FAQs
Comments
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Code P2647 2009 Honda Accord Description

The Variable Valve Timing and Lift Electronic Control (VTEC) system activates the Rocker Arm Oil Control Solenoid (VTEC Solenoid Valve) by command from the Engine Control Module (ECM) / Powertrain Control Module (PCM), and it charges/discharges the hydraulic circuit of the VTEC mechanism that switches valve timing between Low and High. The ECM/PCM monitors oil pressure in the hydraulic circuit of the VTEC mechanism using the rocker arm oil pressure switch (VTEC oil pressure switch) downstream of the rocker arm oil control solenoid (VTEC solenoid valve). If there is a difference between the oil pressure condition in the hydraulic circuit that is determined by the ECM/PCM command and the oil pressure condition that is determined by the status of the rocker arm oil pressure switch (VTEC oil pressure switch), the system is considered faulty, and the Diagnostic Trouble Code (DTC) is stored.

OBDII Code P2647 2009 Honda Accord - Rocker Arm Oil Pressure Switch Circuit High Voltage - AutoCodes.com — P2647 2009 Honda Accord Code - Rocker Arm Oil Pressure Switch Circuit High Voltage

What does this mean?

What are the Possible Causes of the DTC P2647 2009 Honda Accord?

Check engine oil level, oil condition and pressure
Faulty Variable Valve Timing and Lift Electronic Control (VTEC) / Rocker Arm Oil Pressure Switch
VTEC/Rocker Arm Oil Pressure Switch harness is open or shorted
VTEC/Rocker Arm Oil Pressure Switch circuit poor electrical connection

How to Fix the DTC P2647 2009 Honda Accord?

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 P2647 2009 Honda Accord 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 P2647 2009 Honda Accord code?

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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.

Frequently Asked Questions about P2647 2009 Honda Accord Code

1. What are the common symptoms of OBDII code P2647 on a 2009 Honda Accord?

- Common symptoms include rough idling, loss of power, illuminated check engine light, and decreased fuel efficiency.

2. What can cause the OBDII code P2647 to trigger in a 2009 Honda Accord?

- The code is usually triggered by a malfunction in the rocker arm oil pressure switch circuit, resulting in high voltage readings.

3. How can I diagnose the rocker arm oil pressure switch circuit in a 2009 Honda Accord with code P2647?

- Diagnosing involves checking the wiring and connector for any damage, testing the oil pressure switch, and inspecting the oil level and condition.

4. Can a faulty oil pressure switch cause code P2647 in a 2009 Honda Accord?

- Yes, a faulty oil pressure switch can cause the code to trigger due to incorrect voltage readings being sent to the engine control module.

5. Is it safe to drive a 2009 Honda Accord with OBDII code P2647?

- It is not recommended to drive the vehicle with code P2647 as it can lead to further engine damage if left unresolved.

6. How much does it typically cost to repair OBDII code P2647 on a 2009 Honda Accord?

- Repair costs can vary depending on the exact cause of the issue, but it may range from $100 to $300 for parts and labor.

7. Can resetting the check engine light resolve code P2647 on a 2009 Honda Accord?

- Resetting the check engine light may temporarily turn it off, but the underlying issue causing the code will still need to be diagnosed and repaired.

8. Are there any DIY repair tips for fixing OBDII code P2647 in a 2009 Honda Accord?

- DIY tips include checking for loose connections, ensuring proper oil levels, and inspecting the oil pressure switch for any signs of damage.

9. How long does it take to repair the rocker arm oil pressure switch circuit issue causing code P2647 in a 2009 Honda Accord?

- The repair time can vary based on the exact cause of the problem, but it typically takes around 1-2 hours for a professional mechanic to diagnose and fix the issue.

10. Can code P2647 on a 2009 Honda Accord be a recurring problem even after repair?

- If the root cause of the issue is not properly addressed during the repair, it is possible for code P2647 to recur. Regular maintenance and follow-up checks can help prevent this.