P0505 Mitsubishi Code - Idle Control System Malfunction
Quick Answer
This system automatically controls engine idle speed to a specified level. Common causes include Faulty IACV-AAC valve, IACV-AAC valve harness is open or shorted, IACV-AAC valve 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
- P0505 Mitsubishi indicates Idle Control System Malfunction.
- Common causes
- Common causes include Faulty IACV-AAC valve, IACV-AAC valve harness is open or shorted, IACV-AAC valve 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.
Code P0505 Mitsubishi Description
One step of IACV-AAC valve movement causes the respective opening of the air bypass passage. (i.e. when the step advances, the opening is enlarged.) The opening of the valve is varied to allow for optimum control of the engine idling speed. The crankshaft position sensor (POS) detects the actual engine speed and sends a signal to the ECM. The ECM then controls the step position of the IACV-AAC valve so that engine speed coincides with the target value memorized in 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 warm-up, deceleration, and engine load (air conditioner, power steering, and cooling fan operation).
What are the Possible Causes of the DTC P0505 Mitsubishi?
- Faulty IACV-AAC valve
- IACV-AAC valve harness is open or shorted
- IACV-AAC valve circuit poor electrical connection
How to Fix the DTC P0505 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 P0505 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.
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Frequently Asked Questions about P0505 Mitsubishi Code
1. What are the common symptoms of OBDII code P0505 in a Mitsubishi?
- Common symptoms include high or fluctuating idle speed, stalling at idle, and the Check Engine light illuminated.
2. What are the possible causes of an Idle Control System Malfunction in a Mitsubishi triggering code P0505?
- Potential causes include a faulty idle air control valve, dirty throttle body, vacuum leaks, or issues with the engine's sensors.
3. How can I diagnose the cause of OBDII code P0505 in my Mitsubishi?
- You can use a scan tool to read the code and further diagnose the issue by checking the idle air control valve, throttle body, vacuum hoses, and engine sensors.
4. Can a dirty throttle body cause OBDII code P0505 in a Mitsubishi?
- Yes, a dirty throttle body can restrict airflow and cause irregular idle speed, triggering code P0505.
5. What is the typical repair process for fixing OBDII code P0505 in a Mitsubishi?
- The repair process may involve cleaning or replacing the idle air control valve, cleaning the throttle body, checking for vacuum leaks, and verifying the operation of engine sensors.
6. Is it safe to continue driving my Mitsubishi with OBDII code P0505 present?
- It is not recommended to continue driving with code P0505 present, as it can lead to poor engine performance, reduced fuel efficiency, or potential stalling while driving.
7. Can I reset OBDII code P0505 in my Mitsubishi to see if it returns?
- You can clear the code, but if the underlying issue causing code P0505 is not fixed, the code is likely to return after some driving cycles.
8. How much does it typically cost to repair OBDII code P0505 in a Mitsubishi?
- The repair cost can vary depending on the exact cause of the issue, but it may range from $100 to $500 or more, including parts and labor.
9. Are there any preventive maintenance tips to avoid OBDII code P0505 in a Mitsubishi?
- Regularly cleaning the throttle body, checking for vacuum leaks, and maintaining the engine sensors can help prevent issues that trigger code P0505.
10. Can a DIY enthusiast repair OBDII code P0505 in a Mitsubishi, or should it be handled by a professional mechanic?
- Depending on the root cause, some DIY enthusiasts with automotive knowledge and tools may be able to address the issue, but complex repairs may require professional expertise.
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