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 thinks there's a problem with the part that helps turn on the second fan that cools the engine. It's like when a fan in your room doesn't turn on even though you pressed the button.
The P1485 code indicates a high voltage condition in the control circuit for the second engine cooling fan relay.
The Engine Control Module (ECM) monitors the voltage in the control circuit of the second cooling fan relay. If the voltage is higher than expected, the ECM sets the P1485 code. This could be due to a short circuit, an open circuit, or a malfunctioning relay.
• Engine overheating
• Cooling fan not operating
• Check Engine Light illuminated
• Faulty cooling fan relay
• Wiring issues such as a short or open circuit
• Defective Engine Control Module (ECM)
Relay: An electrical switch that opens and closes under the control of another electrical circuit.
ECM: Engine Control Module, the computer that controls engine functions.
• Use an OBD-II scanner to confirm the code.
• Inspect the cooling fan relay and its wiring for damage.
• Test the relay and wiring for continuity and proper operation.
• Replace the faulty cooling fan relay.
• Repair or replace damaged wiring.
• Replace the ECM if it is found to be defective.
• OBD-II scanner
• Multimeter
• Basic hand tools
$100 - $300
Moderate
• Chrysler PT Cruiser
• Dodge Neon
• Jeep Grand Cherokee
• Regularly inspect cooling system components.
• Ensure proper maintenance of electrical connections.
• Replace relays at recommended intervals.
Electrical Circuit Issue
• Do not ignore the Check Engine Light.
• Have the cooling system checked regularly.
Check with your vehicle manufacturer for warranty coverage on electrical components.
This code has been commonly reported in vehicles with known issues in their cooling fan systems, particularly in older models.
High – Engine overheating can lead to severe engine damage.
Driving with an overheating engine can cause serious damage and is unsafe. Address this issue promptly.
• Engine at operating temperature
• Cooling fans engaged
The cooling fan relay is typically located in the engine bay, often in the fuse box.
Q: Can I drive with a P1485 code?
A: It's not recommended to drive with this code as it can lead to engine overheating.
Q: How do I reset the P1485 code?
A: After repairs, use an OBD-II scanner to clear the code, or disconnect the battery for a few minutes.
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