AutoCodes – Honda – P1659 2009 Honda Accord

P1659 2009 Honda Accord Code - Electronic Throttle Control System Control Relay OFF 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: P1659 2009 Honda Accord indicates Electronic Throttle Control System Control Relay OFF 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 15,184

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 P1659 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 P1659 2009 Honda Accord - Electronic Throttle Control System Control Relay OFF Malfunction - AutoCodes.com — P1659 2009 Honda Accord Code - Electronic Throttle Control System Control Relay OFF Malfunction

What does this mean?

What are the Possible Causes of the DTC P1659 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 P1659 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 P1659 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 P1659 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 P1659 2009 Honda Accord Code

1. What are the common symptoms of OBDII code P1659 on a 2009 Honda Accord?

- Common symptoms include the Check Engine light illuminating, reduced engine power, stalling, or difficulty accelerating.

2. What does the OBDII code P1659 indicate on a 2009 Honda Accord?

- The code P1659 indicates a malfunction in the Electronic Throttle Control System Control Relay OFF.

3. What are the possible causes of the Electronic Throttle Control System Control Relay OFF malfunction on a 2009 Honda Accord?

- Possible causes include a faulty throttle control relay, wiring issues, a malfunctioning throttle body, or a problem with the engine control module.

4. How can I diagnose the cause of the P1659 code on my 2009 Honda Accord?

- Diagnostic steps may include checking the throttle control relay, inspecting the wiring for damage, testing the throttle body, and scanning the engine control module for related faults.

5. Can I drive my 2009 Honda Accord with the P1659 code present?

- It is not recommended to drive the vehicle with the P1659 code present, as it can lead to performance issues and potential safety hazards.

6. How can I reset the OBDII code P1659 on my 2009 Honda Accord?

- Resetting the code can be done using an OBDII scanner or by disconnecting the vehicle's battery for a few minutes. However, it is crucial to address the underlying issue causing the code first.

7. Will replacing the throttle control relay fix the P1659 code on my 2009 Honda Accord?

- While a faulty throttle control relay is a common cause of the P1659 code, it is essential to diagnose the issue accurately to avoid unnecessary part replacements.

8. Is it safe to continue driving if the Electronic Throttle Control System Control Relay OFF malfunction is intermittent?

- It is not recommended to continue driving if the issue is intermittent, as it can lead to sudden loss of power or acceleration while on the road.

9. How much does it typically cost to repair the P1659 code on a 2009 Honda Accord?

- The cost of repairs for the P1659 code can vary depending on the cause of the issue, but it may involve replacing the throttle control relay, repairing wiring, or addressing other related components.

10. Can a DIY enthusiast fix the P1659 code on a 2009 Honda Accord, or is professional help required?

- While some DIY enthusiasts may be able to address the P1659 code by following repair guides and using the right tools, it is recommended to seek professional help for an accurate diagnosis and repair.