P0494 - Fan Speed Low

The cooling fan is running slower than the ECM expects.

Code Overview

The cooling fan is running slower than the ECM expects.

Common Causes

• Cooling fan relay or control fault
• Fan motor issue
• Wiring, power, or ground problem

Diagnostic Steps

1. Command the fan on if supported
2. Check fan speed feedback and operation
3. Inspect relay, fuse, power, and ground circuits

Likely Repairs & Cost Guides

Use test results to confirm the fault before pricing the repair.

Related OBD Codes

Browse the closest code-family pages when the same fault pattern often shows up nearby.

Next Steps

Move from the code to a diagnosis path, then into repair pricing once the fault is confirmed.