P0480 on Infiniti: How to Diagnose & Fix
Cooling Fan 1 Control Circuit
2 Infiniti models · 2 documented issues · 2 critical · $300-$1,800 repair
P0480 on Infiniti by model: symptoms, diagnosis and fix
M56 owners report overheating or rising coolant temperature caused by radiator leakage and/or electric cooling fan control failure. The issue is typically related to age-related plastic tank cracking, fan motor wear, or failure of the integrated fan control assembly, especially in hot climates or stop-and-go driving.
Common Symptoms
- Engine temperature rising in traffic
- Coolant smell or visible coolant leak
- Cooling fans not running properly
- Overheat warning
- A/C performance drops at idle
How to Fix
Diagnosis includes pressure-testing the cooling system, checking for seepage at radiator end tanks, and commanding fan operation with a scan tool. Repairs usually involve replacing the radiator and/or fan assembly, refilling with the correct Nissan/Infiniti blue coolant, and bleeding the system; typical cost ranges from about $700 to $1,800 depending on which components fail.
What you need to fix it
Only diagnosis- and fitment-reviewed repair parts are linked here.
- DENSO 221-9285 radiatorOEMDENSO 221-9285
Affiliate-enabled confirmed radiator-leak branch Fitment/availability: DENSO catalogs 221-9285 for the 2011-2013 M56 5.6L. Confirm the listing's vehicle checker, hose and cooler connections before purchase; it does not repair a fan-contr…
- Genuine Infiniti complete radiator fan assembly 21481-1BH0BOEM21481-1BH0B
Confirmed integrated fan/shroud/control-assembly branch Fitment/availability: Select 21481-1BH0B, superseding 21481-1BH0A, for listed 2011-2013 M56 VK56VD. Buy the complete assembly only when testing identifies its motor/control branch; …
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
- TipIf the temperature climbs mainly at idle but drops at speed, inspect fan operation before assuming a thermostat problem.
Sources for this issue (1)
P0480 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 P0480 mean on a Infiniti?
P0480 stands for "Cooling Fan 1 Control Circuit." P0480 indicates a fault in the engine control module's circuit that operates cooling fan 1 (or the fan relay it drives). The computer detected an open, short, or out-of-range condition in the fan control output. Because the cooling fan helps prevent the engine from overheating — especially at idle, low speeds, or with the A/C on — a fan that won't run can lead to high coolant temperatures. It is worth addressing fairly promptly to avoid overheating, particularly in hot weather or stop-and-go traffic. On Infiniti it is documented across 2 models: FX50, M56.
What are the most common causes of P0480?
The most common causes of P0480 are: Faulty cooling fan relay, Failed cooling fan motor, Wiring damage, shorts, or corroded connectors in the fan circuit, Blown fuse or fusible link for the fan, Poor ground for the fan motor or relay, Faulty fan control module (where used), PCM driver circuit fault (less common). The specific cause varies by vehicle.
How much does it cost to fix P0480 on a Infiniti?
Published repair estimates on Infiniti range from $300 to $1,800 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 P0480 on a different make?
View P0480 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.