AutoCodes – Infiniti – P0506 2005 Infiniti G35

P0506 2005 Infiniti G35 Code - Idle Speed Control System RPM Lower Than Expected

Quick Answer

The Engine Control Module (ECM) controls the engine idle speed to a specified level through the fine adjustment of the air, which is let into the intake manifold, by operating the electric throttle control actuator. Common causes include Dirty throttle body, Electric throttle control actuator misadjusted or damaged, Faulty Electric throttle control actuator. 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: P0506 2005 Infiniti G35 indicates Idle Speed Control System RPM Lower Than Expected.
Common causes: Common causes include Dirty throttle body, Electric throttle control actuator misadjusted or damaged, Faulty Electric throttle control actuator.
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 3,121

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 Apr 22, 2019

Description
Possible Causes
How To Fix
Tech Notes
Cost to Diagnose
FAQs
Comments
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Code P0506 2005 Infiniti G35 Description

The Engine Control Module (ECM) controls the engine idle speed to a specified level through the fine adjustment of the air, which is let into the intake manifold, by operating the electric throttle control actuator. The operating of the throttle valve is varied to allow for optimum control of the engine idling speed. The ECM calculates the actual engine speed from signals of crankshaft position sensor (POS) and camshaft position sensor.
The ECM controls the electric throttle control actuator so that the engine speed coincides with the target value memorized in the ECM. The target engine speed is the lowest speed at which the engine can operate steadily. The optimum value stored in the ECM is determined by taking into consideration various engine conditions, such as during warming up, deceleration, and engine load (air conditioner, power steering and cooling fan operation, etc.)

OBDII Code P0506 2005 Infiniti G35 - Idle Speed Control System RPM Lower Than Expected - AutoCodes.com — P0506 2005 Infiniti G35 Code - Idle Speed Control System RPM Lower Than Expected

What does this mean?

What are the Possible Causes of the DTC P0506 2005 Infiniti G35?

Dirty throttle body
Electric throttle control actuator misadjusted or damaged
Faulty Electric throttle control actuator
Electric throttle control actuator harness is open or shorted
Electric throttle control actuator circuit poor electrical connection
Intake air leak

How to Fix the DTC P0506 2005 Infiniti G35?

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 does this mean?

Code Tech Notes

If there are no intake leaks, clean throttle body, adjust engine idle and erase engine code. If the code comes back you may have to replace the Electric Throttle Control Actuator (Motor) to repair the problem.

What is the Cost to Diagnose the Code?

Labor: 1.0

To diagnose the P0506 2005 Infiniti G35 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 P0506 2005 Infiniti G35 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 P0506 2005 Infiniti G35 Code

1. What does the OBDII code P0506 mean for a 2005 Infiniti G35?

P0506 indicates that the engine's idle speed is lower than the manufacturerâ€™s specified range, which points to an issue with the Idle Speed Control System.

2. What are the common symptoms of code P0506 on a 2005 Infiniti G35?

Symptoms may include a rough or unstable idle, stalling at low speeds or when stopped, poor acceleration, and the Check Engine Light turning on.

3. What can cause a P0506 code on a 2005 Infiniti G35?

Common causes include a dirty or malfunctioning throttle body, a vacuum leak, a faulty idle air control valve, or issues with the mass air flow sensor.

4. Can a dirty throttle body trigger the P0506 code?

Yes, a dirty throttle body can restrict airflow, causing the idle speed to drop below the expected range and triggering the P0506 code.

5. How do I fix the P0506 code on my 2005 Infiniti G35?

Begin by cleaning the throttle body, inspecting for vacuum leaks, and checking the idle air control valve. If the issue persists, diagnose the mass air flow sensor or other related components.

6. Is it safe to drive with a P0506 code on a 2005 Infiniti G35?

While it may be safe to drive short distances, prolonged driving with a P0506 code can lead to stalling, poor performance, or additional engine issues.

7. How do I check for vacuum leaks that might cause the P0506 code?

Inspect all vacuum hoses for cracks, disconnections, or damage, and listen for hissing sounds near the intake manifold or hoses while the engine is running.

8. Can a faulty mass air flow (MAF) sensor cause the P0506 code?

Yes, a malfunctioning MAF sensor can provide incorrect air intake readings, affecting the idle speed control system and triggering the P0506 code.

9. Will resetting the Check Engine Light fix the P0506 code?

Resetting the Check Engine Light may temporarily clear the code, but the underlying issue must be fixed to prevent the code from returning.

10. Do I need to reprogram the ECU after fixing the P0506 code?

In most cases, reprogramming the ECU is not necessary, but performing an idle relearn procedure may be required after cleaning or replacing throttle-related components.