AutoCodes – Honda – P1659 2008 Honda Accord

P1659 2008 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 2008 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 23,136

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 2008 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 2008 Honda Accord - Electronic Throttle Control System Control Relay OFF Malfunction - AutoCodes.com — P1659 2008 Honda Accord Code - Electronic Throttle Control System Control Relay OFF Malfunction

What does this mean?

What are the Possible Causes of the DTC P1659 2008 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 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 P1659 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 P1659 2008 Honda Accord code?

Need more information on how to fix the P1659 2008 Honda Accord code? Get Access to Factory Service Manuals

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 2008 Honda Accord Code

1. What are the common symptoms of OBDII code P1659 in a 2008 Honda Accord?

The common symptoms of OBDII code P1659 in a 2008 Honda Accord include the engine stalling or idling roughly, reduced engine power, and the malfunction indicator light (MIL) illuminating on the dashboard.

2. What causes the Electronic Throttle Control System Control Relay OFF Malfunction in a 2008 Honda Accord?

The P1659 code in a 2008 Honda Accord is typically triggered by a malfunction in the electronic throttle control system control relay, which can be caused by relay failure, wiring issues, or a faulty electronic throttle body.

3. How can I diagnose the Electronic Throttle Control System Control Relay OFF Malfunction in my 2008 Honda Accord?

Diagnosing the P1659 code in a 2008 Honda Accord involves using an OBDII scanner to retrieve the code, inspecting the throttle control relay, checking the wiring for any damage, and testing the electronic throttle body for proper operation.

4. Can I still drive my 2008 Honda Accord with the P1659 code present?

It is not recommended to drive your 2008 Honda Accord with the P1659 code present, as it can lead to engine performance issues and potential safety hazards. It is advisable to address the issue promptly.

5. How do I repair the Electronic Throttle Control System Control Relay OFF Malfunction in a 2008 Honda Accord?

To repair the P1659 code in a 2008 Honda Accord, you may need to replace the electronic throttle control system control relay, repair any damaged wiring, or replace the electronic throttle body if it is found to be faulty.

6. Will resetting the OBDII code P1659 in my 2008 Honda Accord make it go away permanently?

Simply resetting the OBDII code P1659 in your 2008 Honda Accord will not make it go away permanently if the underlying issue causing the code is not addressed. It is crucial to diagnose and repair the root cause of the problem.

7. How much does it cost to fix the Electronic Throttle Control System Control Relay OFF Malfunction in a 2008 Honda Accord?

The cost of fixing the P1659 code in a 2008 Honda Accord can vary depending on the specific repairs needed. It may range from a few hundred dollars for relay replacement to more significant costs if additional parts require replacement.

8. Can a DIY enthusiast repair the P1659 code in a 2008 Honda Accord?

While some DIY enthusiasts may be able to diagnose and repair the P1659 code in a 2008 Honda Accord, it is recommended to have the issue addressed by a qualified mechanic or technician to ensure proper diagnosis and repair.