P0695 indicates that the powertrain control module has detected a low voltage condition in the control circuit for fan 3, meaning the fan is not receiving sufficient power to operate.
A failed relay or an open fuse can prevent power from reaching fan 3, creating a low‑voltage condition.
Corroded, broken, or shorted wires in the fan 3 control circuit can cause insufficient voltage.
A shorted or internally failed motor can draw excessive current, pulling the circuit voltage low.
A poor ground or a weak 12 V supply from the battery/alternator can lead to low voltage at the fan control circuit.
Rarely, the PCM’s fan‑control output driver can fail, but this is far less common than a component in the fan circuit.
In most cases the PCM is not the cause; replacing it is rarely necessary and is usually not the correct repair.
Clearing the code will turn off the Check Engine Light temporarily, but if the underlying fault remains, the code will return.
Driving with a non‑functioning fan 3 can lead to engine overheating, especially under load, so it should be repaired promptly.
Fans are typically designated by their location or function (e.g., radiator, condenser, auxiliary). Fan 3 is an additional cooling fan that may serve a secondary radiator or electric auxiliary cooling system.