Easy one-page printout for the garage or repair shop
This summary uses the existing diagnostic information shown in full below.
This code means that the car's computer has detected a problem with the second fan that helps cool the engine. It's getting too much power, which is not normal.
The P0694 code is triggered when the Engine Control Module (ECM) detects a high voltage condition in the control circuit for the second cooling fan.
The P0694 code indicates that the ECM has identified an electrical issue in the control circuit of the secondary cooling fan. This could be due to a short circuit, a failed relay, or a problem with the fan motor itself. The control circuit is responsible for regulating the fan's operation, and a high voltage signal suggests an abnormality in this regulation.
• Engine overheating
• Cooling fan running continuously
• Check Engine Light illuminated
• Faulty cooling fan relay
• Short circuit in the fan control wiring
• Defective cooling fan motor
ECM: Engine Control Module
Relay: An electrical switch that opens and closes under control of another electrical circuit
• Check the cooling fan relay for proper operation.
• Inspect the fan control wiring for shorts or damage.
• Test the cooling fan motor for proper function.
• Replace the faulty cooling fan relay.
• Repair or replace damaged wiring in the fan control circuit.
• Replace the defective cooling fan motor.
• Multimeter
• Relay tester
• Wiring diagram
$100 - $400
Moderate
• Chevrolet Silverado
• Ford F-150
• Toyota Camry
• Regularly inspect the cooling fan and wiring.
• Ensure proper maintenance of the vehicle's electrical system.
• Replace relays and fuses as needed.
Sensor Issue
• Do not ignore the Check Engine Light.
• Avoid driving the vehicle if overheating occurs.
• Consult a professional mechanic for diagnosis and repair.
Repairs may be covered under a vehicle's powertrain warranty if applicable.
The P0694 code has been associated with electrical issues in the cooling system for over a decade, often linked to aging wiring or relay failures.
High – Engine overheating can cause severe damage if not addressed promptly.
Driving with an overheating engine can lead to engine failure and is unsafe. Address the issue immediately to ensure vehicle safety.
• Engine at operating temperature
• Cooling fan engaged
The secondary cooling fan is typically located at the front of the vehicle, near the radiator.
Q: Can I drive with a P0694 code?
A: It's not recommended to drive with this code as it can lead to engine overheating and potential damage.
Q: How can I prevent a P0694 code?
A: Regular maintenance and inspection of the cooling system can help prevent this code.
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