P0481: How to Diagnose & Fix — Cooling Fan 2 Control Circuit
2 vehicles · 2 makes · $450-$1,600 repair
How to diagnose and fix P0481: most-reported vehicles
Ranked by owner reports. Each card gives the symptoms, how to confirm the cause, the fix, parts and sources for that vehicle.
Jeep Grand Wagoneer · 2021–2023
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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RAM ProMaster City · 2015–2018
The single electric cooling fan module used on the ProMaster City fails in two ways: the fan control relay/circuit drops out, and the plastic fan blade separates or the motor seizes. Owners report the fan literally melting off its motor. Because the 2.4L relies entirely on this one fan at low road speed, failure shows up first in stop-and-go delivery duty as a temperature gauge climbing at idle that recovers on the highway. CarComplaints ranks cooling-fan-relay malfunction with engine overheating as the worst reported defect on the 2015 model year, with reports around 24,000-25,000 miles and repair costs near $600-650. A ProMaster City owner documented the dealer replacing the relay for a P0481 code, only to have the van overheat again about 100 miles later because the fan motor itself was the failed part. The same fan module family is used on the Jeep Renegade. Note this is a separate defect from the full-size Ram ProMaster 3.0L diesel / 3.6L gas cooling fan seizure recall - that recall does not cover the City.
Common Symptoms
- Temperature gauge climbing in stop-and-go traffic
- Coolant boiling over or steam from the hood
- A/C performance drops at idle
- Cooling fan never audibly cycles on
- Check engine light
How to Fix
Read fan-control circuit faults, test the relay/control output and confirm that the motor and blade rotate freely. Replace the complete module only when the motor/module branch is confirmed; repair power, ground or relay faults instead when those fail testing.
What you need to fix it
Only diagnosis- and fitment-reviewed repair parts are linked here.
- Genuine Mopar radiator cooling fan module 68461973AA$279
Current complete fan module for 2015-2022 Ram ProMaster City 2.4L Base/SLT; supersedes 68247205AA and 68360299AA. The separate relay/control circuit still must be tested first.
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Sources for this issue (3)
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P0481 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 P0481 mean?
P0481 stands for "Cooling Fan 2 Control Circuit." This code indicates the PCM detected a fault in the control circuit for cooling fan 2 (a second engine cooling/condenser fan relay or circuit). The cooling fans help regulate engine and A/C condenser temperature, especially at low speeds and idle. A fault can lead to reduced cooling performance, potential overheating in heavy load or hot conditions, and poor A/C cooling. It should be checked promptly to avoid overheating risk.
What are the most common causes of P0481?
The most common causes of P0481 are: Faulty cooling fan relay (fan 2), Open or shorted wiring in the fan control circuit, Corroded or loose connector at relay or fan, Failed cooling fan motor, Blown fuse feeding the fan circuit, Failing PCM (less common). The specific cause varies by vehicle.
How much does it cost to fix P0481?
Repair costs for P0481 range from $450 to $1,600, depending on the vehicle and root cause.
Which vehicles are affected by P0481?
Au7o has documented P0481 across 2 vehicle models from 2 manufacturers: Jeep, RAM.
Content compiled with AI assistance using NHTSA complaints, TSBs, and owner reports. May contain errors. Always verify with your vehicle's service manual.