P0505 on Nissan: How to Diagnose & Fix
Idle Air Control System Malfunction
1 Nissan model · 1 documented issue · 1 critical · $150-$700 repair
P0505 on Nissan by model: symptoms, diagnosis and fix
Multiple owners report the Cube stalling unexpectedly while driving at various speeds, including highway speeds. The engine shuts off without warning, causing loss of power steering and power brakes. In some cases, pumping the accelerator at the moment of stalling can catch the engine before it dies completely. The issue has been linked to faulty crankshaft position sensors, throttle body failures, and ECM software bugs.
Common Symptoms
- Engine stalls without warning while driving
- Loss of power steering and brakes during stall
- Engine dies at idle or low speed
- Check engine light may or may not illuminate
- Difficulty restarting after stalling
How to Fix
Start with cleaning the throttle body and checking for vacuum leaks. Replace the crankshaft position sensor if codes P0335 or P0340 are present. Have the ECM software updated at a Nissan dealer. If the problem persists, the throttle body assembly may need replacement. Always keep up with spark plug replacement at the recommended 105,000-mile interval.
What you need to fix it
Only diagnosis- and fitment-reviewed repair parts are linked here.
- Genuine Nissan crankshaft position sensor 23731-1VA0A
2009-2014 Cube 1.8L on the live fitment table; confirm VIN and connector/current supersession.
- Genuine Nissan camshaft position sensor 23731-EN22A
2009-2014 Cube 1.8L on the live fitment table; confirm VIN/current supersession.
- Genuine Nissan electronic throttle body 16119-9SE0A
Confirm VIN/core terms and complete all required electronic-throttle learning.
- Genuine Nissan spark plug 22401-JD01B
Quantity four; verify VIN, plug specification and gap-handling instructions.
As an Amazon Associate, we earn from qualifying purchases; other part links may also earn au7o a commission. Confirm fitment by VIN before buying.
Owner tips & cautions
- TipClean the throttle body with CRC Throttle Body Cleaner every 30,000 miles — this prevents carbon buildup that causes stalling.
- WarningStalling at highway speeds is extremely dangerous. If it happens more than once, do not drive until diagnosed.
P0505 code reference
General diagnostic-code context. The code alone does not confirm a cause for your vehicle; use the applicable issue card and its sources.
Frequently asked questions
What does P0505 mean on a Nissan?
P0505 stands for "Idle Air Control System Malfunction." P0505 indicates a malfunction in the idle air control (IAC) system, which manages how much air bypasses the throttle plate to keep the engine idling smoothly at the correct RPM. On older systems this is a dedicated IAC valve/motor; the computer uses it to raise idle for cold starts, A/C load, or accessory load. When the system can't maintain the target idle, you may get a high or low idle, surging, rough idle, or stalling — especially at stops or when cold. The cause is usually a dirty or failed IAC valve, but vacuum leaks and electrical faults are common too. On Nissan it is documented across 1 model: Cube.
What are the most common causes of P0505?
The most common causes of P0505 are: Dirty or carbon-clogged idle air control valve, Failed IAC valve motor or stuck pintle, Vacuum leak in the intake system, Dirty throttle body or sticking throttle plate, Wiring or connector fault in the IAC circuit, Faulty PCV system causing unmetered air, PCM/ECM control fault. The specific cause varies by vehicle.
How much does it cost to fix P0505 on a Nissan?
Published repair estimates on Nissan range from $150 to $700 depending on the model and root cause. If an issue mentions a recall or campaign, check your VIN with the manufacturer or NHTSA and confirm eligibility and coverage with a dealer.
Looking for P0505 on a different make?
View P0505 across all makes →Content compiled with AI assistance using NHTSA complaints, TSBs, and owner reports. May contain errors. Always verify with your vehicle's service manual.