P0505 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 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 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?
- 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?
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 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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Information for Specific Makes
- P0505 Acura — Idle Air Control Valve
- P0505 Chrysler — Idle Control System Malfunction
- P0505 Dodge — Idle Control System Malfunction
- P0505 Ford — Idle Control System Malfunction
- P0505 Honda — Idle Air Control Valve
- P0505 Infiniti — Idle Air Control Valve
- P0505 Jeep — Idle Control System Malfunction
- P0505 KIA — Idle Air Control System
- P0505 Land Rover — Idle Control System Malfunction
- P0505 Lexus — Idle Air Control System
- P0505 Lincoln — Idle Control System Malfunction
- P0505 Mazda — Idle Control System Malfunction
- P0505 Mercedes-Benz — Idle Control System Malfunction
- P0505 Mercury — Idle Control System Malfunction
- P0505 Mitsubishi — Idle Control System Malfunction
- P0505 Nissan — Idle Air Control Valve
- P0505 Scion — Idle Control System Malfunction
- P0505 Toyota — Idle Air Control System
- P0505 Volvo — Air Assisted Control Valve
Frequently Asked Questions about P0505 Code
No Frequently Asked Questions about P0505 Code found.
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