AutoCodes – Honda – P1658 2009 Honda Accord

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

Quick Answer

The Powertrain Control Module (PCM) controls the throttle valve opening. Common causes include Faulty Electronic Throttle Control System (ETCS) Relay, Electronic Throttle Control System Relay harness is open or shorted, Electronic Throttle Control System Relay circuit poor electrical connection. 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 (ETCS) Relay, Electronic Throttle Control System Relay harness is open or shorted, Electronic Throttle Control System Relay circuit poor electrical connection.
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 5,282

How popular is this code, among other codes? Low

Repair Importance Level

Urgent (Diagnose now) (3 / 3)

Repair Difficulty Level

Intermediate (2 / 3)

What is this?

Table of contents Created and updated by William Orellana on Oct 20, 2022

Description
Possible Causes
How To Fix
Cost to Diagnose
FAQs
Comments
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Code P1658 2009 Honda Accord Description

The Powertrain Control Module (PCM) controls the throttle valve opening. The system includes the throttle actuator, the throttle valve, Throttle Position (TP) sensors A and B, the Accelerator Pedal Position (APP) sensor, the Electronic Throttle Control System (ETCS) control relay, and the PCM. The APP sensor is operated via the throttle cable to determine the accelerator opening value when the driver presses the accelerator pedal. The accelerator pedal opening value is converted to a signal in the APP sensor and transmitted to the PCM to compute the target position. The PCM determines the throttle valve target position according to the signal received and operates the throttle actuator to move the throttle valve to the target position. The actual throttle valve position is determined by TP sensor A (installed in the throttle body). When the voltage is applied from the ETCS control relay to the IG1ETCS terminal for a set time after the ETCS control relay is turned off, the PCM detects a malfunction in the ETCS control relay power switch, and a DTC is stored.

OBDII Code P1658 2009 Honda Accord - Electronic Throttle Control System Control Relay ON Malfunction - AutoCodes.com — P1658 2009 Honda Accord Code - Electronic Throttle Control System Control Relay ON Malfunction

What does this mean?

What are the Possible Causes of the DTC P1658 2009 Honda Accord?

Faulty Electronic Throttle Control System (ETCS) Relay
Electronic Throttle Control System Relay harness is open or shorted
Electronic Throttle Control System Relay circuit poor electrical connection
Faulty Powertrain Control Module (PCM)

How to Fix the DTC P1658 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 P1658 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 P1658 2009 Honda Accord code?

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Need Help with the 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 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.