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Engine-Codes – Honda – P1658 2009 Honda Accord

P1658 2009 Honda Accord Code - Electronic Throttle Control System Control Relay ON Malfunction

Quick Answer

The P1658 diagnostic trouble code (DTC) for a 2009 Honda Accord indicates a malfunction in the Electronic Throttle Control System Control Relay being stuck in the ON position. Common causes include Faulty Electronic Throttle Control System Control Relay, Wiring or connector issues in the ETCS circuit, Defective throttle position sensor. 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
P1658 2009 Honda Accord indicates Electronic Throttle Control System Control Relay ON Malfunction.
Common causes
Common causes include Faulty Electronic Throttle Control System Control Relay, Wiring or connector issues in the ETCS circuit, Defective throttle position sensor.
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 P1658 2009 Honda Accord Description

The P1658 diagnostic trouble code (DTC) for a 2009 Honda Accord indicates a malfunction in the Electronic Throttle Control System Control Relay being stuck in the ON position. The Electronic Throttle Control System (ETCS) is responsible for controlling the throttle opening angle electronically based on input from various sensors. The control relay plays a crucial role in regulating the power supply to the ETCS, ensuring proper throttle response and engine performance.

OBDII Code P1658 2009 Honda Accord - Electronic Throttle Control System Control Relay ON Malfunction
P1658 2009 Honda Accord Code - Electronic Throttle Control System Control Relay ON Malfunction

Common Causes of P1658 2009 Honda Accord

  1. Faulty Electronic Throttle Control System Control Relay
  2. Wiring or connector issues in the ETCS circuit
  3. Defective throttle position sensor
  4. Corrosion or damage to the throttle body
  5. Software glitches in the engine control module (ECM)

Symptoms of P1658 2009 Honda Accord

  1. Sudden acceleration or deceleration
  2. Difficulty maintaining speed
  3. Engine stalling or hesitation
  4. Check Engine Light illuminated
  5. Reduced fuel efficiency

How to Fix P1658 2009 Honda Accord

  1. Begin by conducting a thorough inspection of the ETCS control relay, wiring, and connectors for any visible damage or corrosion.
  2. Test the throttle position sensor to ensure it is functioning correctly and replace if necessary.
  3. Clean the throttle body to remove any buildup of carbon deposits or debris that could be affecting its operation.
  4. Check for any software updates for the engine control module and perform a reflash if required.
  5. If the issue persists, replace the Electronic Throttle Control System Control Relay with a new, OEM part to ensure proper function.

Cost to Fix P1658 2009 Honda Accord

The typical repair costs for addressing a P1658 code on a 2009 Honda Accord can range from $150 to $400, including parts and labor. However, it is essential to note that specific diagnosis time and labor rates at auto repair shops can vary significantly based on factors such as location, vehicle make and model, and engine type. Rates in metropolitan areas or at dealerships may be higher, while independent shops often charge less. It is advisable to obtain quotes from multiple sources to get a more accurate estimate for the repair.

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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 P1658 2009 Honda Accord Code

1. What are the common symptoms of OBDII code P1658 in a 2009 Honda Accord?

When the Electronic Throttle Control System Control Relay ON Malfunction occurs, common symptoms may include engine stalling, rough idling, or a noticeable decrease in acceleration.

2. What can cause the Electronic Throttle Control System Control Relay ON Malfunction in a 2009 Honda Accord?

Possible causes of OBDII code P1658 in a 2009 Honda Accord include a faulty electronic throttle control relay, wiring issues, or a malfunctioning electronic throttle control unit.

3. How serious is the Electronic Throttle Control System Control Relay ON Malfunction in a 2009 Honda Accord?

This issue can affect the drivability of the vehicle and may lead to safety concerns, so it is important to address it promptly to prevent further damage.

4. Can I continue driving my 2009 Honda Accord with OBDII code P1658?

It is not recommended to continue driving the vehicle with this code present, as it can result in performance issues and potentially lead to more severe problems down the line.

5. How can I diagnose and repair OBDII code P1658 in my 2009 Honda Accord?

Diagnosing and repairing this code typically involves inspecting the electronic throttle control relay, checking the wiring for any faults, and testing the electronic throttle control unit for proper functionality.

6. Is it possible to reset the OBDII code P1658 in a 2009 Honda Accord?

Resetting the code may temporarily clear the check engine light, but if the underlying issue causing the malfunction is not addressed, the code is likely to reappear.

7. Can a DIY enthusiast fix the Electronic Throttle Control System Control Relay ON Malfunction in a 2009 Honda Accord?

While some basic troubleshooting steps can be taken by a DIY enthusiast, diagnosing and repairing this issue may require specialized tools and expertise, making it advisable to seek professional help.

8. How much does it cost to repair OBDII code P1658 in a 2009 Honda Accord?

The cost of repairing this code can vary depending on the exact cause of the malfunction and the labor rates in your area. It is recommended to get a diagnostic assessment from a qualified mechanic for an accurate estimate.

9. Will OBDII code P1658 cause my 2009 Honda Accord to fail an emissions test?

Yes, if this code is present during an emissions test, it is likely to cause a failure. It is important to address the underlying issue before attempting an emissions test.

10. What measures can be taken to prevent the recurrence of OBDII code P1658 in a 2009 Honda Accord?

Regular maintenance, such as checking and cleaning the throttle body, ensuring proper wiring connections, and using quality fuel, can help prevent the reoccurrence of this code in your 2009 Honda Accord.

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