AutoCodes – Honda – P2647 2008 Honda Accord

P2647 2008 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 2008 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 17,012

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
Step-by-Step Diagnostic Guide
Possible Causes
How To Fix
Cost to Diagnose
FAQs
Comments
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Code P2647 2008 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 2008 Honda Accord - Rocker Arm Oil Pressure Switch Circuit High Voltage - AutoCodes.com — P2647 2008 Honda Accord Code - Rocker Arm Oil Pressure Switch Circuit High Voltage

What does this mean?

What are the Possible Causes of the DTC P2647 2008 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 2008 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 2008 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 2008 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 2008 Honda Accord Code

1. What are the common symptoms of OBDII code P2647 on a 2008 Honda Accord?

- Common symptoms include rough idling, loss of power, reduced fuel efficiency, and the Check Engine light illuminating.

2. What does the OBDII code P2647 for a 2008 Honda Accord mean?

- The code indicates a high voltage condition in the circuit of the rocker arm oil pressure switch.

3. What are the possible causes of OBDII code P2647 on a 2008 Honda Accord?

- Possible causes include a faulty rocker arm oil pressure switch, wiring issues, low engine oil level, or a malfunctioning Engine Control Module (ECM).

4. How can I diagnose the issue related to OBDII code P2647 on my 2008 Honda Accord?

- You can start by checking the oil level, inspecting the wiring and connections to the oil pressure switch, and using a multimeter to test the switch's voltage.

5. Is it safe to continue driving my 2008 Honda Accord with OBDII code P2647?

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

6. Can I reset the OBDII code P2647 on my 2008 Honda Accord by disconnecting the battery?

- While disconnecting the battery may clear the code temporarily, it is best to diagnose and repair the underlying issue to prevent the code from reappearing.

7. How much does it typically cost to repair OBDII code P2647 on a 2008 Honda Accord?

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

8. Can I replace the rocker arm oil pressure switch myself on a 2008 Honda Accord?

- If you have the necessary tools and mechanical knowledge, you can replace the switch yourself. However, it is recommended to consult a professional if you are unsure.

9. Will OBDII code P2647 on a 2008 Honda Accord cause permanent damage if not addressed promptly?

- Ignoring the code can potentially lead to engine damage over time, so it is important to address the issue promptly to prevent costly repairs.

10. How long does it take to repair OBDII code P2647 on a 2008 Honda Accord?

- The repair time can vary depending on the exact cause of the issue and the availability of parts, but it typically takes a few hours to complete the repair.