P0485

DTC P0485, sometimes indicated as P048500 is an OBD diagnostic trouble code indicating a generic fault with the vehicle powertrain (i.e. engine and gearbox). This code identifies an error with the auxiliary emissions system causing cooling fan power/ground circuit malfunction.

One possible cause of this DTC is a wiring issue where the fan power or ground circuit is shorted or open. Another cause could be a bad fan motor or relay.
To troubleshoot this issue, start by checking the wiring for any shorts or opens. If no issues are found, then test the fan motor and relay. If either of these components are bad, replace them.

• P0485: Cooling Fan Power/Ground Circuit Malfunction
• P0485: Fan Power/Ground Circuit
• P0485: Control Fan Power/Ground Circuit Malfunction
• P0485: Engine coolant blower motor, power/earth – circuit malfunction
• P0485 00: Engine coolant blower motor, power/earth - circuit malfunction
• P0485 00: Cooling fan malfunction