P0494 - OBD II Trouble Code

Our automotive experts have put together the following information about the P0494 diagnostic trouble code. We've provided the common symptoms that occur when this code is set along with the frequent repairs that address the issues related to the P0494 code.

OBD II Fault Code

• OBD II P0494

OBD-II Code Cooling fans may stay on all the time is defined as a Fan Speed Low

The purpose of the electric cooling fan system is to provide extra cooling capacity to the conventional radiator cooling system on hot days, and/or when the A/C is on, an/or when the vehicle is being driven in stop and go traffic which causes insufficient Airflow over the radiator. When the engine control module (PCM) cannot control the cooling fan as desired, it will set code P0494.

Cooling fans may stay on all the time Symptoms

• A/C may not operate
• Cooling fans may stay on all the time
• Engine may overheat

Common Problems That Trigger the P0494 Code

• Engine cooling fan control module failure
• Engine cooling fan failure
• Engine cooling fan relay failure
• Powertrain Control Module (PCM) failure
• Wiring issue

Common Repairs Needed for the P0494 Code

• Radiator Fan Assembly Replacement