OBD-II · Engine and powertrain (P)
P0480
Cooling fan control circuit fault
What it means
The ECU detects an electrical fault in cooling fan control circuit 1. Incorrect coolant temperature data is a separate diagnosis, even if it affects fan operation.
Likely causes, most likely first
| No. | Cause |
|---|---|
| 01 | fan relay coil fault |
| 02 | blown control circuit fuse |
| 03 | failed fan control module |
| 04 | open or shorted control wiring |
| 05 | ECU fan driver fault |