P0480 on Audi: How to Diagnose & Fix
Cooling Fan 1 Control Circuit
1 Audi model · 1 documented issue · $150-$500 repair
P0480 on Audi by model: symptoms, diagnosis and fix
Various plastic coolant flanges and fittings can crack and leak, particularly on the side of the engine. These plastic components become brittle with age and heat exposure. Multiple leak points possible.
Common Symptoms
- Coolant leak on side of engine
- Low coolant warning
- Sweet coolant smell
- Overheating if severe
- Coolant puddle after parking
How to Fix
Replace failed coolant flange or fitting. Consider replacing nearby plastic fittings while in there as they likely have similar wear. Metal replacement flanges available from aftermarket.
Sources for this issue (2)
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 Audi?
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 Audi it is documented across 1 model: A4.
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 Audi?
Published repair estimates on Audi range from $150 to $500 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.