AutoCodes – Mitsubishi – P1506 Mitsubishi

P1506 Mitsubishi Code - Idle Control System RPM Lower Than Expected At Low Temperature

Quick Answer

P1506 Mitsubishi indicates Idle Control System RPM Lower Than Expected At Low Temperature. Common causes include Faulty Idle Air Control (IAC) valve, Dirty Idle Air Control (IAC) valve / Throttle Body, Idle Air Control (IAC) valve harness is open or shorted. 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: P1506 Mitsubishi indicates Idle Control System RPM Lower Than Expected At Low Temperature.
Common causes: Common causes include Faulty Idle Air Control (IAC) valve, Dirty Idle Air Control (IAC) valve / Throttle Body, Idle Air Control (IAC) valve harness is open or shorted.
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.

Save to My Repairs My Repairs

AI answers can be wrong. Verify repairs with testing. Open full chat

Code Popularity 13,373

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 Aug 25, 2019

Description
Possible Causes
How To Fix
Cost to Diagnose
FAQs
Comments
Add Comment

💬 Need more help? Ask Coddy for instant answers — it's free!

Code P1506 Mitsubishi Description

OBDII Code P1506 Mitsubishi - Idle Control System RPM Lower Than Expected At Low Temperature - AutoCodes.com — P1506 Mitsubishi Code - Idle Control System RPM Lower Than Expected At Low Temperature

What does this mean?

What are the Possible Causes of the DTC P1506 Mitsubishi?

Faulty Idle Air Control (IAC) valve
Dirty Idle Air Control (IAC) valve / Throttle Body
Idle Air Control (IAC) valve harness is open or shorted
Idle Air Control (IAC) valve circuit poor electrical connection

How to Fix the DTC P1506 Mitsubishi?

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 P1506 Mitsubishi 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 P1506 Mitsubishi code?

Need more information on how to fix the P1506 Mitsubishi code? Get Access to Factory Service Manuals

Need Help with the Code?

Get the P1506 Mitsubishi code diagnosed by a professional: Find a repair shop in your area

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 P1506 Mitsubishi Code

1. What are the common symptoms of OBDII code P1506 in a Mitsubishi related to the idle control system RPM being lower than expected at low temperatures?

- Common symptoms include rough idle, stalling at idle, and fluctuations in engine speed.

2. What are some possible causes of OBDII code P1506 in a Mitsubishi?

- Potential causes may include a faulty idle air control valve, vacuum leaks, a dirty throttle body, or issues with the engine coolant temperature sensor.

3. How can I diagnose the cause of OBDII code P1506 in my Mitsubishi?

- Diagnostic steps may involve checking for vacuum leaks, inspecting the idle air control valve, cleaning the throttle body, and testing the engine coolant temperature sensor.

4. Can extreme weather conditions affect the occurrence of OBDII code P1506 in a Mitsubishi?

- Yes, extreme cold temperatures can exacerbate issues with the idle control system, leading to a lower than expected RPM at idle.

5. Is it safe to continue driving my Mitsubishi with OBDII code P1506 present?

- It is not recommended to drive your vehicle with this code present, as it can lead to potential stalling and other drivability issues.

6. How can I repair OBDII code P1506 in my Mitsubishi?

- Repairs may involve replacing the idle air control valve, fixing any vacuum leaks, cleaning the throttle body, or addressing issues with the engine coolant temperature sensor.

7. Can a DIY enthusiast fix OBDII code P1506 in a Mitsubishi, or should it be done by a professional mechanic?

- Depending on your level of automotive knowledge and experience, some repairs related to this code can be done DIY, but it's always recommended to consult with a professional mechanic for accurate diagnosis and repair.

8. What are some preventive maintenance tips to avoid encountering OBDII code P1506 in a Mitsubishi?

- Regularly cleaning the throttle body, checking for vacuum leaks, and ensuring proper engine coolant temperature sensor function can help prevent issues leading to this code.

9. Will resetting the OBDII system clear OBDII code P1506 in a Mitsubishi?

- While resetting the system may temporarily clear the code, it is important to diagnose and address the underlying issue to prevent it from reoccurring.

10. Can a low battery voltage trigger OBDII code P1506 in a Mitsubishi?

- Yes, low battery voltage can sometimes cause irregularities in the idle control system, leading to the occurrence of this code. It is advisable to check the battery health as part of the diagnostic process.