P0494
Fan Speed Low
Generic code
Auxiliary Emissions Control
High severity
Hard repair
Free on OBD DashX
Want real-world data on P0494?
See which problems come with P0494, how often it shows up in other vehicles, and how to fix it — step by step.
- Real-world fix data
- How often it happens
- Step-by-step repairs
What P0494 means
- The fault code P0494 indicates that the fan speed in the cooling system is lower than the expected range. This can lead to inadequate cooling of the engine and potential overheating issues.
Possible symptoms
- Engine overheating
- Temperature gauge reading higher than normal
- Check Engine Light illuminated
- Lack of airflow from the radiator fans
- Reduced air conditioning performance, if the cooling fans are shared with the AC system
Possible causes
- Faulty cooling fan motor
- Malfunctioning cooling fan relay
- Wiring or connector problems in the cooling fan circuit
- Defective engine coolant temperature sensor
- Faulty engine control module (ECM)
Related parts
- Cooling Fan: Radiator fan. Problems lead to engine overheating
Possible solutions
- Inspect and replace the faulty cooling fan motor, if necessary
- Test and replace the malfunctioning cooling fan relay, if required
- Check for wiring or connector issues in the cooling fan circuit and repair as needed
- Replace the defective engine coolant temperature sensor, if needed
- Consider replacing the engine control module (ECM) if all components are functioning correctly
Free on OBD DashX
P0494 on OBD DashX
Real-world causes, how often this code shows up, and the fix — step by step.
Open P0494 No sign-up needed · available in 10 languagesScan your own car
Read and clear fault codes, live data and service resets with the CaRPM app.