P0217 on Infiniti: How to Diagnose & Fix
Engine Overtemperature Condition
2 Infiniti models · 2 documented issues · 2 critical · $600-$1,800 repair
P0217 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; …
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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)
P0217 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 P0217 mean on a Infiniti?
P0217 stands for "Engine Overtemperature Condition." This code sets when the engine control module detects that the engine has exceeded its safe operating temperature, meaning the engine is overheating based on the coolant temperature sensor reading. Because excessive heat can warp the cylinder head, blow the head gasket, or seize the engine, the computer flags this condition and may reduce power to protect the engine. It generally indicates a real cooling system problem rather than just a sensor glitch, though a faulty sensor can occasionally cause a false reading. An overheating engine should be stopped as soon as it is safe to avoid serious damage. On Infiniti it is documented across 2 models: M56, FX50.
What are the most common causes of P0217?
The most common causes of P0217 are: Low coolant level or a leak in the cooling system, Stuck-closed thermostat, Failed water pump, Faulty radiator cooling fan or fan circuit, Clogged or blocked radiator, Faulty coolant temperature sensor giving a false high reading, Head gasket failure or combustion gases in the coolant, Air pocket in the cooling system after service. The specific cause varies by vehicle.
How much does it cost to fix P0217 on a Infiniti?
Published repair estimates on Infiniti range from $600 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.
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Content compiled with AI assistance using NHTSA complaints, TSBs, and owner reports. May contain errors. Always verify with your vehicle's service manual.