B1480 Battery Rundown Protection Circuit

OBD2 Code: B1480

Description: Battery rundown protection circuit malfunction.

Definition: The B1480 code indicates a problem with the battery rundown protection circuit, which is designed to prevent the vehicle’s battery from being drained when the ignition is off. This may involve issues with wiring, connectors, or components related to this system.

b1480: Battery Rundown Protection Circuit
– P0C4F: Battery Energy Control Module 1 Performance (Severity: Moderate)
– P0C50: Battery Energy Control Module 2 Performance (Severity: Moderate)

Common Causes

b1480 – Battery Rundown Protection Circuit

Common causes:
– Faulty battery rundown protection module
– Short circuit in the battery rundown protection circuit
– Open circuit in the battery rundown protection circuit
– Wiring issues in the battery rundown protection system
– Corroded or damaged connectors related to the battery rundown protection circuit

Common Misdiagnosis

OBD2 Code: B1480

Description: Battery Rundown Protection Circuit

Common Misdiagnosis: The battery itself is often mistakenly replaced, when the issue may actually lie in a faulty relay or wiring problem within the protection circuit.

Common Diagnostic Steps

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OBD2 Code: B1480

Description: Battery Rundown Protection Circuit

Common Diagnostic Steps:

• Verify the battery charge level and ensure it is fully charged.
• Inspect the battery terminals and cables for corrosion or loose connections.
• Check the fuses related to the battery rundown protection circuit.
• Examine wiring harnesses for any signs of damage or wear that could cause a short or open circuit.
• Use a multimeter to test voltage levels at various points in the circuit to identify any discrepancies.
• Inspect and test the functionality of any relays associated with the battery rundown protection system.
• If applicable, use an OBD2 scanner to clear the code and see if it returns after performing repairs or adjustments.
• If necessary, consult vehicle-specific repair manuals for further troubleshooting steps tailored to your make and model.