P2480: Exhaust Gas Temperature Sensor Circuit/Open Bank 1 Sensor 5
The P2480 code indicates an open circuit in the exhaust gas temperature (EGT) sensor circuit for Bank 1 Sensor 5. This sensor is typically located downstream in the exhaust system, often after the diesel particulate filter (DPF) or selective catalytic reduction (SCR) system. An open circuit means there is a break in the wiring or the sensor itself has failed, preventing the engine control module (ECM) from reading exhaust temperature. This can lead to incorrect regeneration cycles, reduced fuel efficiency, and potential damage to emission components.
1. Most Common Causes
- Faulty EGT sensor 5 (Bank 1) with internal open circuit
- Open circuit in sensor signal or ground wire (damaged or cut wiring)
- Sensor connector disconnected, corroded, or with loose terminals
- Internal PCM failure (rare)
2. Symptoms You Will Notice
- Check Engine Light illuminated
- Reduced fuel economy
- Failed emissions test
- Possible limp mode or reduced engine power
3. Step-by-Step Diagnosis
Step 1: Use an OBD2 scanner to confirm the code and check for additional codes.
Step 2: Visually inspect the EGT sensor and its wiring for damage, corrosion, or loose connections.
Step 3: Measure resistance across the sensor terminals; compare to manufacturer specifications (typically 100-200 kΩ at room temperature).
Step 4: Check for voltage and ground at the sensor connector with the ignition on; should be around 5V reference and good ground.
Step 5: If wiring and voltage are okay, replace the EGT sensor.
4. Frequently Asked Questions
Is it safe to drive with this code?▼
It is not recommended to drive long distances with this code, as it can cause improper DPF regeneration and potential damage to the exhaust system. Short trips may be okay, but have it diagnosed promptly.
How much does it cost to fix?▼
The cost typically ranges from $50 to $150 for the sensor part, plus labor if you have a mechanic replace it. DIY replacement can save on labor costs.
5. Commonly Affected Makes
This is a generic OBD2 code, potentially applicable to any manufacturer using this diagnostic standard.