AutoCodes – Scion – P0505 2007 Scion xB

P0505 2007 Scion xB 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, A/C switch circuit. 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: P0505 2007 Scion xB indicates Idle Control System Malfunction.
Common causes: Common causes include Open or short in IAC valve circuit, IAC valve stuck or closed, A/C switch circuit.
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 3,529

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 Mar 30, 2024

Description
Step-by-Step Diagnostic Guide
Possible Causes
How To Fix
Tech Notes
Cost to Diagnose
FAQs
Comments
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Code P0505 2007 Scion xB 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 P0505 2007 Scion xB - Idle Control System Malfunction - AutoCodes.com — P0505 2007 Scion xB Code - Idle Control System Malfunction

What does this mean?

What are the Possible Causes of the DTC P0505 2007 Scion xB?

Open or short in IAC valve circuit
IAC valve stuck or closed
A/C switch circuit
Air induction system
Ventilation valve and hose
ECM

How to Fix the DTC P0505 2007 Scion xB?

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 P0505 2007 Scion xB 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.

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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 P0505 2007 Scion xB Code

1. What are the common symptoms of OBDII code P0505 on a 2007 Scion xB?

- Common symptoms include high idle speed, low idle speed, fluctuating idle speed, stalling at idle, and possibly the Check Engine light being illuminated.

2. What are the possible causes of the Idle Control System Malfunction (P0505) in a 2007 Scion xB?

- The potential causes can include a faulty idle air control valve (IACV), dirty throttle body, vacuum leaks, wiring issues, or a defective PCM (powertrain control module).

3. How can I diagnose the Idle Control System Malfunction on my 2007 Scion xB?

- Diagnosis typically involves checking for vacuum leaks, inspecting the IACV for proper operation, cleaning the throttle body, and using a scan tool to monitor idle control system parameters.

4. Can a dirty throttle body cause OBDII code P0505 on a 2007 Scion xB?

- Yes, a dirty throttle body can disrupt proper airflow and cause irregular idle speed, triggering the P0505 code. Regular maintenance of the throttle body can help prevent this issue.

5. Is it safe to continue driving my 2007 Scion xB with OBDII code P0505 activated?

- It is generally not recommended to drive with the P0505 code active, as it can lead to poor engine performance, stalling, and potential safety hazards. Prompt diagnosis and repair are advised.

6. How can I reset the OBDII code P0505 on my 2007 Scion xB?

- The code can be reset using an OBDII scanner or by disconnecting the car's battery for a few minutes. However, it is crucial to address the underlying issue causing the code to prevent it from reoccurring.

7. Does the Idle Control System Malfunction (P0505) affect fuel efficiency in a 2007 Scion xB?

- Yes, the irregular idle caused by P0505 can impact fuel efficiency by causing the engine to run inefficiently. Resolving the issue and restoring proper idle control can help improve fuel economy.

8. Can a DIY enthusiast repair the Idle Control System Malfunction (P0505) on a 2007 Scion xB?

- Depending on the root cause, some DIY repairs like cleaning the throttle body or checking for vacuum leaks may be feasible. However, more complex issues may require professional diagnosis and repair.

9. What are some preventive maintenance tips to avoid OBDII code P0505 on a 2007 Scion xB?

- Regularly cleaning the throttle body, checking for vacuum leaks, using quality fuel, and following the manufacturer's maintenance schedule can help prevent idle control system issues.

10. How much does it typically cost to repair the Idle Control System Malfunction on a 2007 Scion xB?

- The cost of repairs can vary depending on the specific cause of the issue. Simple fixes like cleaning the throttle body may cost less, while replacing the idle air control valve or addressing wiring problems can be more expensive. It's best to consult a mechanic for an accurate estimate.