AutoCodes – Honda – P0602 2009 Honda Accord

P0602 2009 Honda Accord Code - Control Module Programming Error

Quick Answer

The Engine Control Module (ECM) is equipped with an update program to update its control program. Common causes include Engine Control Module (ECM) not programmed, Engine Control Module program, Faulty Engine Control Module. 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: P0602 2009 Honda Accord indicates Control Module Programming Error.
Common causes: Common causes include Engine Control Module (ECM) not programmed, Engine Control Module program, Faulty Engine Control Module.
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 2,634

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 Aug 03, 2020

Description
Possible Causes
How To Fix
Cost to Diagnose
FAQs
Comments
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Code P0602 2009 Honda Accord Description

The Engine Control Module (ECM) is equipped with an update program to update its control program. The programs in the CPU of the ECM are classified as an ECM program (update-capable program) and a program for the update function (non-updatable program). The program update only updates the ECM program.
When the ECM power is turned off during an update, the power for the update function is lost, and the update process stops. When the program update is stopped before it is completed, the ECM stores a Diagnostic Trouble Code (DTC) that indicates the update is not finished.

OBDII Code P0602 2009 Honda Accord - Control Module Programming Error - AutoCodes.com — P0602 2009 Honda Accord Code - Control Module Programming Error

What does this mean?

What are the Possible Causes of the DTC P0602 2009 Honda Accord?

Engine Control Module (ECM) not programmed
Engine Control Module program
Faulty Engine Control Module
Wrong Engine Control Module

How to Fix the DTC P0602 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 P0602 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 P0602 2009 Honda Accord code?

Need more information on how to fix the P0602 2009 Honda Accord code? Get Access to Factory Service Manuals

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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 P0602 2009 Honda Accord Code

1. What does OBDII code P0602 mean on a 2009 Honda Accord?

This code indicates a control module programming error, specifically related to the Engine Control Module (ECM) in your Honda Accord.

2. What are the common symptoms of OBDII code P0602 in a 2009 Honda Accord?

Common symptoms include engine performance issues, such as rough idling, stalling, or difficulty starting the vehicle. You may also experience a decrease in fuel efficiency.

3. What can cause OBDII code P0602 to trigger in a 2009 Honda Accord?

The most common cause of P0602 is a faulty ECM or a programming error during the ECM reprogramming process. It can also be triggered by wiring issues or a poor connection to the ECM.

4. How can I diagnose OBDII code P0602 in my 2009 Honda Accord?

Diagnosing P0602 typically involves using a professional OBDII scanner to read the code and check for any related freeze frame data. It's recommended to consult a mechanic for a thorough diagnosis.

5. Can I continue driving my 2009 Honda Accord with OBDII code P0602?

It's not recommended to drive your vehicle with a P0602 code present, as it can lead to further engine performance issues and potential damage. It's best to address the problem promptly.

6. How can I repair OBDII code P0602 in my 2009 Honda Accord?

Repair options may include reprogramming the ECM, replacing a faulty ECM, or addressing any wiring/connection issues. It's advisable to seek professional help for an accurate repair.

7. Will resetting the ECM clear OBDII code P0602 in my 2009 Honda Accord?

Simply resetting the ECM may temporarily clear the code, but if the underlying issue is not addressed, the code is likely to return. It's crucial to diagnose and fix the root cause of the problem.

8. How much does it cost to repair OBDII code P0602 in a 2009 Honda Accord?

The cost of repairing P0602 can vary depending on the exact cause of the issue. Reprogramming the ECM or replacing a faulty ECM can range from a few hundred to over a thousand dollars.

9. Can a DIY enthusiast fix OBDII code P0602 in a 2009 Honda Accord?

While some enthusiasts may have the skills to attempt ECM reprogramming or replacement, diagnosing and repairing P0602 is best left to professional mechanics due to the complexity involved.

10. How can I prevent OBDII code P0602 from occurring in my 2009 Honda Accord in the future?

To prevent P0602, ensure all software updates for your vehicle are done by authorized technicians. Regular maintenance checks and addressing any wiring issues promptly can also help prevent this code.