P0480 on Jeep: How to Diagnose & Fix
Cooling Fan 1 Control Circuit
2 Jeep models · 2 documented issues · 1 critical · $150-$1,600 repair
P0480 on Jeep by model: symptoms, diagnosis and fix
The electric cooling fan module on the Grand Wagoneer has been documented to fail, causing the dual electric radiator fans to run at reduced speed or stop entirely, resulting in engine coolant temperature spikes especially at low speeds and in traffic. The fan control module can develop internal MOSFET failures due to heat cycling, and Stellantis issued related service guidance through their dealer network. Owners report the temperature gauge rising into the red zone during stop-and-go driving and the A/C compressor cutting out as a secondary symptom.
Common Symptoms
- Engine temperature gauge rising above normal in traffic
- Cooling fans audibly not running or running slowly at idle
- A/C compressor cuts out unexpectedly in hot weather
- Overheating warning message on instrument cluster
- Check engine light with fan control related fault codes
How to Fix
Replace the integrated fan control module (FCM) mounted near the radiator assembly. Updated module part numbers have been released by Mopar to address thermal reliability. Inspect cooling fan wiring harness for chafing near the module connector, as wiring damage can mimic module failure. Coolant system inspection and flush recommended simultaneously.
What you need to fix it
Only diagnosis- and fitment-reviewed repair parts are linked here.
- Genuine Mopar 68275634AD standard-duty radiator fan assemblyOEMMopar 68275634AD
Fan/module replacement after command and circuit tests confirm failure on the standard-duty 6.4L branch Fitment/availability: 2022-2023 Grand Wagoneer 6.4L without heavy-duty cooling. Confirm VIN/cooling sales code; not for heavy-duty co…
- Genuine Mopar 68268606AE heavy-duty radiator fan assemblyOEMMopar 68268606AE
Fan/module replacement after command and circuit tests confirm failure on the heavy-duty 6.4L branch Fitment/availability: 2022-2023 Grand Wagoneer 6.4L with heavy-duty cooling. Confirm VIN/cooling sales code; not for standard-duty cooli…
- Genuine Mopar 68468156AC 3.0L radiator fan assemblyOEMMopar 68468156AC
Fan/module replacement after command and circuit tests confirm failure on the 3.0L Hurricane branch Fitment/availability: 2022-2025 Grand Wagoneer 3.0L catalog branch. Confirm VIN/current supersession; not for either 6.4L cooling configu…
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The 3.6L Pentastar JK uses a single electric radiator fan driven by a pulse-width-modulated (PWM) duty-cycle signal from the TIPM rather than a simple on/off relay. The integrated fan motor/controller fails, or the PWM signal circuit faults, so the fan won't spin up at speed — causing overheating in traffic and on trails and setting P0480 (Cooling Fan 1 Control Circuit). Because the fan is commanded by the TIPM through a 3-wire design, the fault can lie in the fan module, the signal wire, grounds (G102 near the passenger headlight), or the TIPM itself, which makes it tricky to diagnose. Overheating risks head/gasket damage on a Pentastar.
Common Symptoms
- Engine overheats at idle / low speed / in traffic
- Temperature climbs while crawling off-road
- Radiator fan not spinning or not ramping to high speed
- Check-engine light with P0480
- A/C performance drops because condenser airflow is lost
How to Fix
Scan for P0480 and confirm whether the fan responds to the PWM command. Check the fan ground at G102 and the brown/light-blue signal wire from the TIPM before condemning parts. Replace the electric cooling-fan module/assembly if the integrated motor/controller is dead; if commands aren't reaching the fan, investigate the TIPM (overlaps the known TIPM-failure issue). Verify coolant level/condition and that the radiator isn't clogged. Test by idling with A/C on and confirming high-speed fan engagement.
What you need to fix it
Only diagnosis- and fitment-reviewed repair parts are linked here.
- Dorman 621-601 complete brushless radiator fan and shroud assemblyOEMDorman 621-601
Complete fan-module replacement after commanded testing confirms correct power/ground/control but failed fan response Fitment/availability: 2012-2017 Wrangler and 2018 Wrangler JK 3.6L application; crosses Mopar 68143894AA/AB. Confirm ex…
As an Amazon Associate, we earn from qualifying purchases; other part links may also earn au7o a commission. Confirm fitment by VIN before buying.
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 Jeep?
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 Jeep it is documented across 2 models: Grand Wagoneer, Wrangler.
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 Jeep?
Published repair estimates on Jeep range from $150 to $1,600 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.