AutoCodes – Scion – P0511 Scion

P0511 Scion Code - Idle Control System Malfunction

Quick Answer

The Idle Air Control (IAC) valve, a rotary solenoid type, is located under the throttle body. Common causes include Open or short in IAC valve circuit, IAC valve stuck or closed, ECM. 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: P0511 Scion indicates Idle Control System Malfunction.
Common causes: Common causes include Open or short in IAC valve circuit, IAC valve stuck or closed, ECM.
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 5,155

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 Jun 14, 2020

Description
Possible Causes
How To Fix
Tech Notes
Cost to Diagnose
FAQs
Comments
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Code P0511 Scion Description

The Idle Air Control (IAC) valve, a rotary solenoid type, is located under the throttle body. Intake air bypassing the throttle valve flows into the IAC valve through a passage. The valve regulates the volume of intake air that bypasses the throttle valve and allows the engine idling speed to be controlled. The IAC valve is used by the ECM to perform idle-up and its feedback signal is used as one factor in target engine idling speed regulation.

OBDII Code P0511 Scion - Idle Control System Malfunction - AutoCodes.com — P0511 Scion Code - Idle Control System Malfunction

What does this mean?

What are the Possible Causes of the DTC P0511 Scion?

Open or short in IAC valve circuit
IAC valve stuck or closed
ECM

How to Fix the DTC P0511 Scion?

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

Before replacing any parts, try cleaning the Idle air control valve.

What is the Cost to Diagnose the Code?

Labor: 1.0

To diagnose the P0511 Scion 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 P0511 Scion code?

Need more information on how to fix the P0511 Scion code? Get Access to Factory Service Manuals

Need Help with the Code?

Get the P0511 Scion code diagnosed by a professional: Find a repair shop in your area

Information for Specific Scion Models

P0511 2005 Scion xB — Idle Control System Malfunction
P0511 2006 Scion xB — Idle Control System Malfunction
P0511 2007 Scion xB — Idle Control System Malfunction

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 P0511 Scion Code

1. What are the common symptoms of OBDII code P0511 in a Scion?

- Common symptoms include irregular idle speed, stalling at idle, and poor acceleration.

2. What can cause the Idle Control System Malfunction code P0511 in a Scion?

- Causes may include a malfunctioning idle air control valve, vacuum leaks, or issues with the throttle body.

3. How can I diagnose the cause of OBDII code P0511 in my Scion?

- A thorough inspection of the idle control system components, checking for vacuum leaks, and testing the idle air control valve can help pinpoint the issue.

4. Can a dirty throttle body trigger the Idle Control System Malfunction code in a Scion?

- Yes, a dirty or clogged throttle body can disrupt the idle control system, leading to the P0511 code.

5. What are some repair tips for fixing OBDII code P0511 in a Scion?

- Cleaning or replacing the idle air control valve, repairing any vacuum leaks, and cleaning the throttle body can often resolve the issue.

6. Is it safe to continue driving my Scion with the P0511 code present?

- It is not recommended to continue driving with the P0511 code as it can lead to further engine performance issues and potential stalls.

7. Can a faulty oxygen sensor trigger the Idle Control System Malfunction code in a Scion?

- While unlikely, a faulty oxygen sensor could indirectly affect the engine's air-fuel mixture and idle control, potentially triggering the P0511 code.

8. How long does it typically take to repair OBDII code P0511 in a Scion?

- The repair time can vary depending on the exact cause of the issue, but it generally takes a few hours to diagnose and fix the problem.

9. Will resetting the OBDII code P0511 in my Scion make it go away permanently?

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

10. Can a professional mechanic help diagnose and repair the Idle Control System Malfunction code in my Scion?

- Yes, a qualified mechanic can perform a thorough diagnosis and repair of the P0511 code to ensure proper functioning of the idle control system.

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