P2480: Exhaust Gas Temperature Sensor Circuit/Open Bank 1 Sensor 5

What it means

The module detects an open or other circuit fault in the bank 1 sensor 5 exhaust gas temperature sensor circuit. The code does not establish that the sensor itself is faulty.

At a glance

• Usually lights the check-engine light
• Affects emissions; the car can fail an emissions test

How it works

Bank 1 sensor 5 measures exhaust gas temperature, and its circuit carries that signal to the control module. P2480 is set when the module detects an open or other circuit fault in that specific sensor circuit; the code alone does not prove the sensor has failed.

Common causes

Most likely first.

1. Open or damaged wiring
2. Loose or corroded connector
3. Faulty sensor

Symptoms

• Check-engine light on

How to diagnose it

1. Record freeze-frame data and check for related exhaust-temperature codes to establish when the bank 1 sensor 5 circuit fault occurred.
2. With the exhaust cool, inspect the bank 1 sensor 5 connector for looseness, corrosion, or a terminal pushed back into the housing.
3. Follow the bank 1 sensor 5 wiring and look for breaks, heat damage, or chafing that could interrupt the circuit.
4. Check continuity and connections in the bank 1 sensor 5 circuit using the manufacturer's wiring information and specification.
5. If wiring and connector checks pass, test the sensor and module-side circuit as specified by the manufacturer before replacing parts.

Common fixes

• Reconnect and secure the bank 1 sensor 5 connector.
• Repair an open or heat-damaged section of bank 1 sensor 5 wiring.
• Clean or repair corroded or displaced connector terminals.
• Replace bank 1 sensor 5 if it fails the specified circuit tests.

Can I keep driving?

With only the check-engine light on and no drivability change, a short drive is generally reasonable, but arrange diagnosis soon. The module may have less reliable exhaust-temperature feedback, which can affect emissions control.