P0505 1998 Honda Civic Code - Idle Air Control Valve
Quick Answer
This system automatically controls engine idle speed to a specified level. Common causes include Faulty Idle Air Control Valve (IACV) valve, IAC valve harness is open or shorted, IAC 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 1998 Honda Civic indicates Idle Air Control Valve.
- Common causes
- Common causes include Faulty Idle Air Control Valve (IACV) valve, IAC valve harness is open or shorted, IAC 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 1998 Honda Civic Description
One step of IACV-AAC valve movement causes the respective opening of the air by-pass 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 1998 Honda Civic?
- Faulty Idle Air Control Valve (IACV) valve
- IAC valve harness is open or shorted
- IAC valve circuit poor electrical connection
How to Fix the DTC P0505 1998 Honda Civic?
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.
Code Tech Notes
User Submitted Video
What is the Cost to Diagnose the Code?
Labor: 1.0
To diagnose the P0505 1998 Honda Civic 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 1998 Honda Civic Code
1. What are common symptoms of OBDII code P0505 in a 1998 Honda Civic?
- Common symptoms include high or fluctuating idle speed, stalling at idle, and potential rough idling.
2. What does the OBDII code P0505 indicate in a 1998 Honda Civic?
- OBDII code P0505 indicates a malfunction in the Idle Air Control (IAC) valve circuit.
3. What are the possible causes of OBDII code P0505 in a 1998 Honda Civic?
- Possible causes include a faulty Idle Air Control (IAC) valve, a dirty or clogged IAC valve, vacuum leaks, or issues with the wiring or connectors.
4. How can I diagnose the cause of OBDII code P0505 in my 1998 Honda Civic?
- Diagnosing the issue may involve checking the IAC valve for proper operation, inspecting for vacuum leaks, and testing the circuit for wiring or connector issues.
5. Is it safe to continue driving with OBDII code P0505 in a 1998 Honda Civic?
- It is not recommended to continue driving with code P0505, as it can lead to potential engine performance issues and increased fuel consumption.
6. Can I clean the Idle Air Control (IAC) valve to fix OBDII code P0505 in my 1998 Honda Civic?
- Cleaning the IAC valve may help if the issue is caused by dirt or debris buildup, but if the valve is faulty, it may need to be replaced.
7. How much does it typically cost to repair OBDII code P0505 in a 1998 Honda Civic?
- The cost of repairing code P0505 can vary depending on the cause, but it may range from $100 to $300 for parts and labor.
8. Can a DIY enthusiast repair OBDII code P0505 in a 1998 Honda Civic?
- A DIY enthusiast with the necessary tools and knowledge may be able to address code P0505 by cleaning or replacing the IAC valve, but professional diagnosis is recommended for accuracy.
9. Will resetting the OBDII code P0505 in my 1998 Honda Civic make it go away?
- Resetting the code may temporarily clear the check engine light, but if the underlying issue causing code P0505 is not addressed, the light is likely to come back on.
10. How important is it to fix OBDII code P0505 in a 1998 Honda Civic promptly?
- It is important to address code P0505 promptly to prevent potential engine performance issues, stalling, and further damage to the vehicle.
Discuss the causes and fixes for P0505 1998 Honda Civic OBDII Code
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hi, i replaced the iac valve, three different ones it works fine for two weeks. Then the same the car idles. Please help??
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Only thing I can think that usullay cause a component to fail many times, is a bad electrical ground. Make sure all harness ground are clean and secure and the valve is fully secured.
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