Fan relay stuck closed or with a faulty internal contact or coil; Control circuit wire shorted to battery voltage or damaged insulation rubbing on bodywork; Corroded, loose or water-damaged connector at the relay, fan motor or PCM; Faulty fan control module or fan motor with integral electronics (on vehicles that use one); Blown fuse or poor power or earth supply affecting the fan circuit and giving a false reading; Internal fault in the PCM output driver.

P0692

Fan 1 Control Circuit High.

Generic
Powertrain
Generic code
Medium severity

How this code is built

P: SystemPowertrain
0: Defined bySAE, the same on every car
6: AreaComputer and output circuits
92: FaultThe specific fault in that area

What it means

P0692 means the powertrain control module has detected a high voltage state in the control circuit for cooling fan 1 when it expected a low or different state. The PCM monitors the fan control output or relay driver, and sets the code when the signal reads higher than commanded, which points to an electrical fault in the circuit rather than a mechanical fan fault alone.

Symptoms

Cooling fan runs constantly or at full speed when the engine is cold
Cooling fan does not run at all, leading to rising temperature or overheating
Engine temperature warning or gauge reading high in traffic
Air conditioning performing poorly at idle or in slow traffic
Malfunction indicator lamp on
Fan stays on after the ignition is switched off

Possible causes

Fan relay stuck closed or with a faulty internal contact or coillikely
Control circuit wire shorted to battery voltage or damaged insulation rubbing on bodyworklikely
Corroded, loose or water-damaged connector at the relay, fan motor or PCMpossible
Faulty fan control module or fan motor with integral electronics (on vehicles that use one)possible
Blown fuse or poor power or earth supply affecting the fan circuit and giving a false readingpossible
Internal fault in the PCM output driverrare

How to diagnose

Read stored codes and freeze frame data, noting coolant temperature, engine speed and whether other cooling or air conditioning codes are present
Check coolant level and condition, and confirm the engine is not actually overheating
Visually inspect the fan wiring, relay, fuses and connectors for heat damage, chafing, corrosion or water ingress
Command the fan on and off with a scan tool's active test, if supported, and note whether it responds correctly
Swap or test the fan relay, checking the coil and contacts, following the manufacturer's procedure
With the relay removed, measure the control circuit for voltage with the ignition on and check for shorts to supply, using the wiring diagram for the model
Check the power and earth supplies to the fan, relay and control module under load
Test the fan motor or fan control module only after the wiring and relay have been proved good, as the layout varies by model and engine

How to fix

Replace the faulty fan relay
Repair or replace the damaged control wiring and secure it clear of sharp edges and heat
Clean or replace corroded or damaged connectors and terminals
Replace the faulty fan motor or fan control module as confirmed by testing
Replace any blown fuse after finding and correcting the cause of the overload
Repair or replace the PCM only after all other causes are ruled out and the fault is confirmed

Can I keep driving?

Medium severity

Short, careful journeys are possible if the engine temperature stays normal, but get it fixed soon. If the fan is not running or the temperature gauge rises, stop and let the engine cool, as overheating can cause serious engine damage.

Guide written by AI from the code's definition. Confirm with a diagnosis before replacing parts.