P1480 – OBD-II DTC

OBD-II DTC P1480 – Fan Relay (Low) Circuit Malfunction

DTC P1480 meaning

DTC P1480 refers to a malfunction in the fan relay circuit, specifically indicating a low circuit condition. This code is part of the On-Board Diagnostics II (OBD-II) system, which monitors various components of the vehicle’s engine and emissions systems. The fan relay is responsible for controlling the operation of the engine cooling fan, which helps maintain optimal engine temperature. When the system detects a low voltage or resistance in the fan relay circuit, it triggers this diagnostic trouble code.

DTC P1480 symptoms

Common symptoms associated with DTC P1480 may include:

• Engine overheating due to the cooling fan not operating properly.
• Increased engine temperature readings on the dashboard.
• Unusual noises from the engine compartment, possibly from the fan motor.
• Check Engine Light (CEL) illuminated on the dashboard.
• Potential loss of engine power or performance issues.

DTC P1480 causes

Several factors can lead to the triggering of DTC P1480, including:

• Faulty fan relay or relay circuit.
• Wiring issues such as shorts, opens, or corrosion in the circuit.
• Defective cooling fan motor.
• Faulty engine control module (ECM) or powertrain control module (PCM).
• Blown fuses related to the cooling fan circuit.

DTC P1480 seriousness

The seriousness of DTC P1480 can vary based on the symptoms and the vehicle’s operating conditions. If the cooling fan is not functioning correctly, it can lead to engine overheating, which may cause severe engine damage over time. Therefore, it is important to address this issue promptly to prevent further complications and ensure the vehicle operates safely.

How to diagnose DTC P1480

To diagnose DTC P1480, follow these steps:

1. Use an OBD-II scanner to confirm the presence of the P1480 code.
2. Inspect the fan relay and its connections for any visible damage or corrosion.
3. Check the wiring harness for shorts, opens, or frayed wires.
4. Test the fan relay operation by applying power directly to it to see if the fan activates.
5. Measure the voltage and ground at the fan motor to ensure proper operation.
6. Inspect the fuses related to the cooling fan circuit and replace any that are blown.
7. If necessary, test the ECM/PCM for faults or updates.

How to fix DTC P1480 step-by-step instructions

To fix DTC P1480, follow these step-by-step instructions:

1. Confirm the DTC P1480 is present using an OBD-II scanner.
2. Inspect and replace the fan relay if it is found to be faulty.
3. Repair or replace any damaged wiring or connectors in the fan relay circuit.
4. Test and replace the cooling fan motor if it is not functioning properly.
5. Replace any blown fuses related to the cooling fan circuit.
6. Clear the DTC using the OBD-II scanner and perform a test drive to ensure the issue is resolved.

How to erase DTC P1480

To erase DTC P1480, follow these steps:

1. Connect an OBD-II scanner to the vehicle’s diagnostic port.
2. Turn the ignition key to the “On” position without starting the engine.
3. Access the scanner’s menu and select the option to clear or erase trouble codes.
4. Confirm the action and wait for the scanner to complete the process.
5. Disconnect the scanner and start the vehicle to ensure the code does not reappear.

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