P0505 Nissan Code - Idle Air Control Valve
Quick Answer
This system automatically controls engine idle speed to a specified level. Common causes include Improper idle speed, Faulty IACV-AAC valve, The IACV-AAC 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
- P0505 Nissan indicates Idle Air Control Valve.
- Common causes
- Common causes include Improper idle speed, Faulty IACV-AAC valve, The IACV-AAC 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.
Code P0505 Nissan 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 takig 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 Nissan?
- Improper idle speed
- Faulty IACV-AAC valve
- The IACV-AAC valve harness is open or shorted
- The IACV-AAC valve circuit poor electrical connection
- Faulty Engine Control Module (ECM)
How to Fix the DTC P0505 Nissan?
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
2000 Nissan Maxima
2001 Nissan Pathfinder
2000 Nissan Sentra
Nissan Factory Service Bulletin OBDII Code P0505
P0505 Ecm IAC issue 2000 & 2001 Maxima Part 1
P0505 Ecm IAC issue 2000 & 2001 Maxima Part 2
P0505 Ecm IAC issue 2000 & 2001 Maxima Part 3
P0505 Ecm IAC issue 2000 & 2001 Maxima Part 4
P0505 Ecm IAC issue 2000 & 2001 Maxima Part 5
P0505 Ecm IAC issue 2000 & 2001 Maxima Part 6
What is the Cost to Diagnose the Code?
Labor: 1.0
To diagnose the P0505 Nissan 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 P0505 Nissan code?
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Need Help with the Code?
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Information for Specific Nissan Models
- P0505 2002 Nissan Sentra — Idle Air Control Valve
Frequently Asked Questions about P0505 Nissan Code
No Frequently Asked Questions about P0505 Nissan Code found.
Discuss the causes and fixes for P0505 Nissan OBDII Code
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i have 1999 nissan quest code is p0505 and crank senser is it could be the crank senser only
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I have a 01 nissan maxima po505came up rpm 1000-1500 up & down
replace idle valve same problem did the relearn procedure
now engine wont crank over...run out of time but will continue troubleshooting this
afternoon.... any sugestions welcome -
You probably have to replaced the ECM as well. It's common for the ECM to get damage after the IACV valve fails. Before replacing the ECM you should have the dealer try to set the idle first.
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The P0335 or you could erase all the codes and start with the one that comes back first.
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Came up with codes p1490 p0100 p0159 p0158 p0140 p0505 car would randomly idle improper amd stall. Finally died out and will turnover but not run. Please help thought it mite be cranck shaft position sensor but code did not show up
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What model and year is your Nissan?
Only code in the list that could cause the engine to stall is the P0100 code ( https://www.autocodes.com/p... ) bad Mass Air Flow (MAF) sensor.Try disconnecting the car battery for about 30 minutes to reset all the systems, clean the air filter and MAF, and then try to start the engine. Make sure the car battery is fully charge, before you start the engine.
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2000 Nissan Maxima throwing p0505 code. Replaced IAC twice, sent ECU off to be repaired but company said it was fine. Replaced IAC again and still same code. Just ordered Mass Air Flow Sensor. Any other suggestions?
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Did you set the engine idle speed after you replaced the IAC? to what speed did you set the idle?
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Rough idle at stop. have a few codes p0505, p0300 p1400, p1490, p1105, p0446. cleaned the mass air flow iacv valve, egr,checked everything and no obvious cracks or shorts etc. At higher speeds it feels like it's choking and not getting gas. When you push hard on the gas it is sluggish than responds. Any suggestions?
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Have you tried clearing all the codes? Sounds like you may have a disconnected hose or an intake leak. P0505 and P0300 may be a result of the problem but not the cause. If you clear the codes, what code comes back first?
P0300 NISSAN - Cylinder Misfire Detected Random Cylinders
Read more: https://www.autocodes.com/p...P1490 NISSAN - Vacuum Cut Valve Bypass Valve
Read more: https://www.autocodes.com/p...P1400 NISSAN - EGRC Solenoid Valve
Read more: https://www.autocodes.com/p...P1105 NISSAN - Manifold Absolute Pressure/Barometric Pressure Switch Solenoid Valve
Read more: https://www.autocodes.com/p...P0446 NISSAN - Evaporative System Canister Vent Control Valve Circuit
Read more: https://www.autocodes.com/p...
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